It’s nice to know that the solution to a single uncomfortable jolt I sometimes have on my bicycle when I shift gears can be solved with only a hundred moving parts and a Bluetooth connection.
I have the solution to that, don't shift under load. If you are going up a steep hill shift before you get to it. If you shift under load you lose momentum and you get that jolt and load clang noise
@@danboofin5094 this is an innovation in its infancy, it’s not better rn necessarily but cars used to be worse than horses and I doubt you’d prefer a horse today
@@maxcheese382 I guess ebikes with motors already exist in a pretty significant way if people want ease and efficiency this seems to me fixing a problem that doesn't really exist and making something tried and true like a bike with a chain drive more complex then It needs to be
@@danboofin5094 I’m saying I think it’s purpose is more that of innovation for the sake of Innovation like this could have a significant use in something else in a very practical way. And the people who will buy this are people that like technology and have plenty of disposable income. It’s not an every mans practical bike but it was never designed to be
@@Ariccio123 I'd much prefer a cable connecting the two parts. I could imagine the Bluetooth connection dropping out from time to time which would probably be a very frustrating experience. Also, what if the transmitted signal suddenly gets corrupted and the gear shifts down or up even though you didn't want it to? Even though successive Bluetooth standards have gotten better over the past years, a simple cable is still much more reliable. Another issue is that if the signal transmission happens over the air then you have two separate components that need a power supply. A cable can fix this as well.
The only update to CVT for vehicles is the introduction of DCVT- direct cvt. Which means you will have the traditional first gear and from there on it will continue into cvt. Just for info
@Darren Munsell Yes like this nice idea, not close to efficiency of single chain drive, other solution is putting derailleur in box, most efficient way, but because makes gearing parts last way longer , gearing manufactures would make a lot less money? Hence why does not exist? But that does not mean you can not make covers for own mech &see the results?
As a cyclist... Did it have to be Bluetooth connected? Just give me a wire, and mechanical connections. I ride in the wet, too. I need to know it'll handle that.
Can I fix it with simple tools? AT: "Absolutely. All you need is a wrench, a screwdriver, a set of digital calipers, a 400hp industrial lathe, a laser cutter, a welding torch, a variety of low-threshold laser calibration tools, some proprietary bearings and lubricants, some variable torque wrenches with proprietary sockets, a tuning fork, an aluminum forge, a freshly harvested pineal gland and a hammer."
@@alienturtle1946 That's true, but since it switches (I assume by this video) as a normal gearbox and goes up by a certain amount at a time, it's a real far stretch to call it constant. So, theoretically a CVT, practically not at all, the only advantage being you can pedal while the gear changes with no issues unlike a gear change on a normal bike.
@@thermionicemission6355 Why is it not practically a CVT? In practice it performs just as a CVT would. For the record, the C means continuous, the opposite of discrete. It doesn't mean constant, so being on a constant ring doesn't matter. _Maybe_ you're assuming that if one ring covers ratios from say, 0.60-0.80, that the next ring might go from 0.85-1.05, so that there's a discontinuity from 0.80-0.85? I don't see why you'd assume this, since they likely made the ratios flow continuously from one ring to the next. Even if there were a small gap in ratios between rings, the gearbox would "theoretically" not be a CVT, but still function as one in "practice".
@@thermionicemission6355 it uses a sort of switch that you can twist to make the "gear" go up or down smoothly, stopping when you release it. It doesn't have steps, or explained better, it (probably) have 1024 or 2048 steps, so basically continuous... A digital signal doesn't allow for "infinite" steps but it approximates It actually is a pretty clever and cool design. If only it didn't use f-ing bluetooth
No, this does function as a CVT. Even if that dial has 'clicks' there is no reason why it would not, or could not have an analogue output to the gearbox.
Do you really believe that the guy who created this super complex gearing system didn't thought of that in the process ? It's something new, ofc there will be flaws
That's stupid because even if something isn't broken, it still needs to be maintained. And innovations are part of the maintenance of a design to remain relevant.
Imagine going to a bike ride with your friends. Everyone has took off and you're alone in the back yelling "LADS, HOLD UP, MY FUCKING GEARS ARE PAIRING"
@@justinsarvela1102 I'd stake good money, that a hipster with a fixed gear bike, drinking a fresh Frappula Frappuccino straight from starbucks could smoke a 500 HP lexus LS 600h in quarter mile drag race without even ruffling his beard.
@@jhoughjr1 so many people reasonably worried that the battery will run out, the transmitter or receiver will receive sufficient physical shock to damage them on rough terrain (or by falling over or running into something) and by loosing connection due to electromagnetic interference from any number of an ever increasing number of sources (or just dumb luck or some electronic hiccup) and also contributing to bandwidth crunch, and making it even harder to service in your garage when it inevitably breaks down as all systems subject to sufficient usage will eventually do because entropy is inescapable. What's more, looking that the mechanism, it could have been done with a mechanical linkage to a crank on the handle just like a conventional shifter that any idiot with some hand tools could fix given enough time and some spare parts. With this, spare parts are harder to install, much more expensive, and require specialized know how to install. Oh and every device that's a bluetooth receiver could track you and assholes could hack your bike. No thanks I'll keep my old bike until they make a version with mechanical linkage.
I think they mean why do you need a Bluetooth connection on a CVT. shouldn’t it be automatic?! Otherwise you’re shifting an infinite number of times to get from top to bottom!
J B, most road bikes already have 22 gears, probably around 16 that don't overlap. Generally gears are spaced 7 to 10% apart. Worst case you drop to half gear easier than you want and slow down by 5%. Best case you drop to half gear easier and increase your cadence by 5% making you 0.5% less efficient to be pessimistic, so then dropping back by 0.5% in speed(less actually) to make up for it meanwhile putting less stress on your legs to keep them fresh later in the ride. So 0.5% less of efficiency is worth all this weight and complication? Really?
Or snow? Ride it to work, leave it outside for 8 hours and come back.. It's all frozen and fucked. My normal MTB doesn't like to work when it's cold. Realised that around -36°C the brake cables won't like to move = no brakes.
That was my first thought too when I saw that mechanism. Even in less dirty environments I would expect the mechanism to develop issues in a short period of time.
I would presume the internal mechanisms would be environmentally sealed. Same as how you wouldn't expect snow and mud to gum up into your cars transmission..
Because nothing was ever made better by being made complicated. I typed this on my phone which acts as a GPS, instant messenger, document reader, internet browser, video streaming device, and camera.
The thing is, nobody wants an overly complicated and likely very unreliable transmission on their bicycle! This thing also weighs a lot compared to a normal drivetrain.
@@A-rk3dn that's because those thing were needed.... And continues transmission on a bicycle is everything but needed.. Don't fix something that isn't broken
1. It can be shifted continuous variable 2. It is complex, a generator + Motor would be better like this sadly dead-looking Gear2 Design from Denmark (got some Design price in 2010)
With existing CVTs I always felt that the cones are too flat. Lots of energy is wasted to squish the V-belt. You need a wide chain just to pass the force from one cone to the other and hope that is does not jam. Or you only have a narrow range of ratios ( like in many stationary machines and slow scooters ). I mean, people accepted full ICEs on their back wheels before Li Ion was invented.
@@michaelbuckers True, but when you have a powerful ebike, you won't notice it. I have a Sparta M8i (Yamaha motor with 80nm of torque), which originally had a Shimano Nexus 8, but after converting it to a Nuvinci N171 (yes, its old, but so strong), it doesn't feel heavier, only difference is when you lift the bike physically (the hub is 1-2kg heavier).
Thats the problem with a lot of the people in CA thats coming out with new tech. They act like because it works in the lab or a nice clean sidewalk that it'll work anywhere and everyone should get one.
Unsprung mass on bikes doesn't amount to much either way. You can be totally fine with 0 springs. But more rotational inertia is with no extra benefit is definitely bad
I mean, no - the discs can be pushed in variably, meaning all the ratios in-between are still there. And this is still a cvt, even if it isn’t automatically shifting. Cvt just means continuously variable transmission - ie, a transmission where the gearing ratios are continuously variable - no gear separation, clutch engagement, etc. the whole thing can be adjusted while under power, continuously, always being tuned to better suit the torque demand - whether that selection/adjustment is done manually or automatically
Stealth The Unknown I do not think so. Like you stated yourself CVT stands for continuously variable transmission. There is nothing continuously about manually selecting the ratio from the handlebar.
Rick Buitendijk Yes there is. The bluetooth connection between the handle bar and the gearbox is your adjuster. And the “continuously” part of cvt just means that there’s seamless transition between gearing ratios, like we have here
Possibly a brilliant answer to a question no one asked. CVT belt drive is not as efficient, and heavier than a normal chain drive. You also now have a need for electricity on a form of transport whose main advantage is freedom from outside power sources and the complexity of technology. If you actually ride a bike you will find that your legs get tired from pedalling more than your thumbs get tired from changing gears. That's why the efficiency needs to be in the drive train.
From an engineering perspective, this appears to me to represent some highly innovative thinking applied to a specific problem. As for the context of the problem - perhaps we're a bit hasty here. This is a prototype and it could prove the naysayers wrong in time. I say, give these guys a break - who knows what applications this elegant tech may have in other arenas. Cheers - Dave :-)
the idea of CVT is smooth changimg ratios, there you've got the overcomplicated version of usual chain system without smooth effect. TT TASK FAILED SUCCESFULLY
Actually, the change IS smooth, that's the whole reason for it, however is it REALLY needed? Seems a small advantage which comes at a (literal) high price.
Well, top-end wireless shifting solutions like Shimano Di2 or SRAM eTap operate like this anyway. The benefit for these systems is the speed of shifting, reduction of cables, options to have multiple shift buttons/leavers, which is very useful on road bikes and time trial bikes which offer lots of hand positions. Then, apps allow special customisation in terms of how the controls behave, or hybrid shifting where the front and back shift simultaneously to maintain smooth gear changes. Its obviously not the most practical, but people opt for it for the features.
@@MishMash95 is there any reason why you can't simply have a basic application installed, with an optional subscription or single time purchase for both major and minor updates. I know Sony (example) has done this with numerous product lines, and I don't see them going out of business anytime soon.
road bikers will complain about the friction, mountain bikers will complain about reliability, bmx or trials doesn't need it. It comes on a proprietary frame too so you can't upgrade it. Overall, it serves no purpose in any disciplines of biking. Edit: Even a commuter bike doesn't need it. It doesn't serve any purpose and no one needs it for any reason.
There are more and more "non-cyclists" on bikes with e-bikes and just city communting etc. These are made for short trips by people who otherwise wouldn't ride
@@getahanddown so why would you buy it then? It should be much more expensive than a regular gear drive. Not worth it if you use your bike only a few times a year
Overall, you can't discover how to make fire without trial and error. Maybe this technology is dead end, maybe not. This solution has its downsides, but also potential hopes. You need dedicated frame atm? We will see, maybe they will manage to downsize this system even more. Who would use it? I can imagine commuters, tourists and training bikes for roadies. Basically anyone who's picky about cadance. And if it will turn out to be dead end? Then maybe it will find use in other industries. Which would mean that cycling made the world a bit better yet again. And as for "it's not needed" argument... well, your comment is kind of unnecesary too. But here you are.
Rafał Wyrwicki pfff most commuters don’t even use their gears anyway. This transmission is a terrible idea. If you are really that picky with cadence... even with how many gears modern bikes have... there are now 2x12 groups. How many more gears do you need?!
it's huge, needs charging, breaks all the time like all electronics, and is not true cvt as it has selectable gears rather than 2 cones spreading apart. it's just pointless
You might be right however i wouldn't say that all electronics break all the time,there is consumer electronics and there is industrial/military electronics those are worlds appart both in quality and price.
This is what we like to call "emerging technology" and "innovation". You don't understand that these clunky first generation products pave the way for further innovation and production of something better. You have to start somewhere, and this attitude of "oh it's big and stupid let's stick with chains" (which, mind you, are also very prone to failure) is toxic and prevents us moving forward with new technologies. If you don't want it, don't buy it, but I'm sure there is a market out there for such a product who are very glad this has come to be and are eager to see it evolve. The engineering that has gone into this transmission is very impressive and the engineers don't deserve to be dismissed because it's not perfect. And regarding it not being a CVT, the multiple speeds are necessary to suit multi riding styles. Some have strength and prefer higher gearing for higher speeds, some have speed and prefer lower gearing for more torque. Besides, not a single car with a CVT on the market is a true CVT. they all have gears because consumer tests showed people were uncomfortable with the engine holding a constant RPM. Subaru Outbacks, for example, have 8 gears despite claiming a CVT.
Wait, what? Who said this system is small??? And it splays your legs apart. Oh my aching hips. And never mind trying to shift once you get dirt in there. Looks heavy. Keep at it. Cheers.
@@RafaWyrwicki still, my scooter's cvt is more compact than this "cvt" and it's lighter and doesn't have all these easy to break parts. If Ii had a mill and a lathe, i'd have no problems taking an old scooter, taking out the transmission, making adapters for the cones (main issues would be the wheel hub and putting the belt on), getting the appropriate spring for the driven cone and there you have it, a cvt, on a bicycle, without the expensive and easy to break electronics.
@@GTAmaniac1 I think that big size is caused by wide ratio range and efficiency issue which is significantly lesser problem for a scooter. Funny thing about engineering is that solution that proofs its usefulness in one application (scooter) may be complete mistake in other (bicycle).
The snowmobile drivetrain isn't sitting out in the open collecting debris in it's many moving parts like this monstrosity. Nuvinci have been doing a much better job on CVT bike drivetains for years and their stuff still barely sells.
For all those saying this solves a non-existing problem: Your view of cycling is too narrow, and you're downplaying the problems conventional chains and derailers have: High maintenance, frequent replacement of cassettes, finicky adjustment, fragile, and the dirty and hungry chain means trousers/skirts need to be protected. Derailers work well enough, but are not the best solution in every case. The inefficiency of CVT is largely irrelevant for ebikes. The simplicity in use of CVT matters, esp. for inexperienced and casual riders, particularly with automatic control, say for an electric rental bike. Enviolo has shown that CVT can work well for (e)bikes, and Gates have shown belts work well for cycling, with internal gears or singlespeed/fixie. But this particular solution by Treadlie... it seems very complicated, open to water and dirt, heavy, limiting in what wheels/tyres you can use - and also appears dead. Their homepage is gone. Too bad, I could see it work well on rental ebikes if refined enough.
This looks expensive, heavy, & stupidly genius. I would never want a bike like this, but it's a cool showcase of the technology. But dam all those moving complex parts, that's a reliability issue waiting to happen.
The one problem I have with conventional systems is downshifting when going uphill. Based on my experience with CVT in a car there might be an advantage here, the issue however is cost (both dollars, complexity, weight, etc.)
It makes sense, the newer generation don't know how to drive a manual and don't know how to change gear on a bicycle. Good job, you've made a "time saving device".
It’s a wonderful idea, if the weight, simplicity, ease of manufacture and reliability can beat the chain n sprockets, then it will change the game..for us Cyclist 👍 keep up the good work..love your idea.
As a cyclist, I know that this thing is going to have exactly 2 gears. Damm I'm strong and up hill. It may have more if they put a dial with red lines on it
Raymond Ager Yeah, That With happen for a while with the Metal chain. Rubber dry rots quickly, if that Rubber chain sits out in the weather for a while, and it’ll snap in no time. I’ve had my bike for a long time, Chain still works just fine. My neighbors bike that sit in the woods for 5 years Had many issues, but the chain wasn’t one of them. It’ll take a looooong time to take a metal chain to wear out like you mentioned.
@@caderamsey8878 I think chain wear depends very much what type of bike and what type of riding. Moutain bike chains and sprockets can wear fairly quickly if used a lot on wet, gravel surfaces. I made the comment simply because stating that rubber belts rot, implies that metal chains never wear out, which isn't the case. I think the important thing is to realise just how crude early derallier sytems were and how they have improved over time. I sure other drive train systems could also improve, given time to develop.
A very good attempt has been made in developing this amazing CVT 'drive'. They have also made the gear-change-control part of it wireless which means you are just one step away from autonomous gear changing - an on-board ECU that selects the correct gear ratio according to the cycle's roadspeed and possibly the option to manually kick-down a gear when needed for extra power such as for going up hills.
Good invention. The belt is nice. The gearBox seems large. There were internal gearBoxes for bicycles for a long time. Not sure what the benefit of this new mechanism would be. Maybe it has a market for some type of bicycle.
All you have to do now is to paint those hubs black in stead of bright white. Then put a whole sealed guarding all around the system, to keep the water out, let alone frozen mud. Then you Have to take the Blu toof shit off, and make the damn thing shift by itself, using no electric power. Make it so a 350 lbs weight lifter dude can push that thing to its limits, and not break. then make it under $250, with a no hassle, absolute life time warranty, so people would actually buy it.... Just sayin'
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I love how they flex that you only have to change the front sprocket and the rear reacts like it’s a design choice that they brought to the user but in reality it is required that it behaves like that otherwise the belt will lose tension.
actually that is the best part about this system, it is belt driven. Belt drives are unaffected by water and mud etc.. while that rapidly wears out a conventional chain. However this system still sucks because it is way too big, overcomplicated, expensive etc and doesn't seem to actually perform the basic functions a CVT is supposed to.
I’ve always dislike the use of CVT transmissions in automobiles. Having it on a bike is a pretty cool idea. Looks like the gear shift is a lot more precise and smooth. The issue with the CVT system on automobiles is the belts don’t last nearly as long as gears with heavy use. I’d be curious to see how well the belts perform along side bicycle chains.
@@edism With practice/patience and proper tools - yes. However I wonder if you would say the same in case of cable fail on trail. My point is - if one is afraid of innovation, there is nothing stopping him from riding fixie/ss. Everybody can ride on whatever they want. And when I hear "don't use that, i don't like it", I'm like "... who do you think you are? my mother?"
Cvt's didn't fail in cars, they recieved a lot of backlash because people are so used to the feel of shifting that they didn't like not shifting. They were also more prone to fail on some brands initially. In bikes I feel like this really doesn't have a place due to the weight, complexity, size, etc. But I think this was probably just a proof of how small they could get a cvt which is reasonably impressive.
@@AndrewUnruh hard core cyclist doesnt solely on bike price but performance and the cycling art itself as well as their physical capability as a cyclist
alexandru p hard core competition cyclist focus on every single detail of themselves and the bikes, you're just trying too hard to appear like smart critics
There is a bicycle CVT transmission called the NuVichi transmission which is actually commercially produced. It is a completely different approach to the problem which is more elegant than the traditional approach of CVTs.
It’s nice to know that the solution to a single uncomfortable jolt I sometimes have on my bicycle when I shift gears can be solved with only a hundred moving parts and a Bluetooth connection.
I have the solution to that, don't shift under load. If you are going up a steep hill shift before you get to it. If you shift under load you lose momentum and you get that jolt and load clang noise
@@robertdarnell5141 if only the engineers knew that before making a belt transmission
@@danboofin5094 this is an innovation in its infancy, it’s not better rn necessarily but cars used to be worse than horses and I doubt you’d prefer a horse today
@@maxcheese382 I guess ebikes with motors already exist in a pretty significant way if people want ease and efficiency this seems to me fixing a problem that doesn't really exist and making something tried and true like a bike with a chain drive more complex then It needs to be
@@danboofin5094 I’m saying I think it’s purpose is more that of innovation for the sake of Innovation like this could have a significant use in something else in a very practical way. And the people who will buy this are people that like technology and have plenty of disposable income. It’s not an every mans practical bike but it was never designed to be
"compact mechanism"
mhm mhm ok go on
"connected via bluetooth"
NONONONO I HATE IT CTRL-W
More like ALT F4
lol, bluetooth got me too
@@keithhudspith5245 Just hold the power button for a few seconds
Honestly, why? It can't be cheaper.
@@Ariccio123 I'd much prefer a cable connecting the two parts. I could imagine the Bluetooth connection dropping out from time to time which would probably be a very frustrating experience. Also, what if the transmitted signal suddenly gets corrupted and the gear shifts down or up even though you didn't want it to?
Even though successive Bluetooth standards have gotten better over the past years, a simple cable is still much more reliable.
Another issue is that if the signal transmission happens over the air then you have two separate components that need a power supply. A cable can fix this as well.
Amazing. An expensive, complex and quite possibly unreliable solution to the problem we never had.
Cvt is one of the cheapest solutions lol. It is unreliable because whole drivetrain relys on a rubber belt... Is it expensive? Hell no.
iare19 did you miss the part with the Bluetooth and the electric motor?
@@o00nemesis00o I guess you missed moat if not all lol.
Yeah, imagine all the dirt and small rocks from the road coming into and destroying that beautiful, expensive mechanism.
these things tend to be more proof of concept, developing technology that can be used elsewhere like machinery where you can't fit a cvt
WHO WOULD WIN???
An Over Engineered Bicycle Gearing System
or
a small rocky boi
Falling over
You think they haven't thought of that?
@@FAB1150 yes
@@pixelmace1423 well then you're quite naive, to put it lightly
@@FAB1150 well sorry for that but can you please explain how they prevent it from jamming when a rock is in there?
As an engeineer, thats really cool. As a cyclist, well, thats useless
The only update to CVT for vehicles is the introduction of DCVT- direct cvt.
Which means you will have the traditional first gear and from there on it will continue into cvt. Just for info
@Darren Munsell Yes like this nice idea, not close to efficiency of single chain drive, other solution is putting derailleur in box, most efficient way, but because makes gearing parts last way longer , gearing manufactures would make a lot less money?
Hence why does not exist?
But that does not mean you can not make covers for own mech &see the results?
Yeah. Only if you're a middle level manager who is environmentally conscious and lives close to their job.
It's a niche lol.
I would like to try it but I highly doubt I would like to purchase it. And yes I am both an engineer and a cyclist.
As a cyclist...
Did it have to be Bluetooth connected? Just give me a wire, and mechanical connections. I ride in the wet, too. I need to know it'll handle that.
In Shot Productions: "How many moving parts do you have?"
Advanced Tranxmissions: "yes"
Q - How many moving parts do you have?"
A - All of them!
Q: ...and how much does this assembly and its power supply weigh in total?
A: Magnificent
21 Savage: *a lot*
Q - Could you explain and demonstrate the system?
A - Yes, give me 2 min
Can I fix it with simple tools?
AT: "Absolutely. All you need is a wrench, a screwdriver, a set of digital calipers, a 400hp industrial lathe, a laser cutter, a welding torch, a variety of low-threshold laser calibration tools, some proprietary bearings and lubricants, some variable torque wrenches with proprietary sockets, a tuning fork, an aluminum forge, a freshly harvested pineal gland and a hammer."
Imagine not being able to change gears when going up a hill because your headphones wanted to connect with your bike
"Something's loose"
"Great, let's check and regrease all of the 200 joints!"
Jesus
Thats not a CVT, there is no “continuous” transmission if you have to manually engage the rings, thats just a more complex variable belt transmission
The rings are still conical, so each ring works for a range of gear ratios rather than a single ratio. Hence, continuous
@@alienturtle1946 That's true, but since it switches (I assume by this video) as a normal gearbox and goes up by a certain amount at a time, it's a real far stretch to call it constant. So, theoretically a CVT, practically not at all, the only advantage being you can pedal while the gear changes with no issues unlike a gear change on a normal bike.
@@thermionicemission6355 Why is it not practically a CVT? In practice it performs just as a CVT would.
For the record, the C means continuous, the opposite of discrete. It doesn't mean constant, so being on a constant ring doesn't matter.
_Maybe_ you're assuming that if one ring covers ratios from say, 0.60-0.80, that the next ring might go from 0.85-1.05, so that there's a discontinuity from 0.80-0.85? I don't see why you'd assume this, since they likely made the ratios flow continuously from one ring to the next.
Even if there were a small gap in ratios between rings, the gearbox would "theoretically" not be a CVT, but still function as one in "practice".
@@thermionicemission6355 it uses a sort of switch that you can twist to make the "gear" go up or down smoothly, stopping when you release it.
It doesn't have steps, or explained better, it (probably) have 1024 or 2048 steps, so basically continuous... A digital signal doesn't allow for "infinite" steps but it approximates
It actually is a pretty clever and cool design. If only it didn't use f-ing bluetooth
No, this does function as a CVT. Even if that dial has 'clicks' there is no reason why it would not, or could not have an analogue output to the gearbox.
Well, I never thought to myself “man my bike is real reliable, how do I make it unreliable?” But if i ever do this is the answer
Dude I LOL’d on this. Thanks!
Do you really believe that the guy who created this super complex gearing system didn't thought of that in the process ? It's something new, ofc there will be flaws
I always thought to myself after comoletely replacing my drive train? why the fuck are these cables skipping gears every 2 hours?
@@Neoproxy_ Similar to engineers who designed cameras have never used a camera. One glaring flaw was the complex gear was exposed to the environment.
There would be an easier solution
Just put less tension on the chain and you get an unreliable shifting bike
"If it ain't broke, fix it until it is"
Brought to you by American Express.
Hahahaha I love this comment
thats the CVT way! lmao
Id say
Fix it til your clients are
That's stupid because even if something isn't broken, it still needs to be maintained. And innovations are part of the maintenance of a design to remain relevant.
Imagine going to a bike ride with your friends. Everyone has took off and you're alone in the back yelling "LADS, HOLD UP, MY FUCKING GEARS ARE PAIRING"
Or you left it in a high gear last ride and you gotta wait 5 minutes for it to brrrrr itself down to a gear you can take off in
Haha good one!
i mean, that's what people are doing in their CVT cars anyways...haha
i mean......srams wireless mountain bike drivetrain.
@@justinsarvela1102 I'd stake good money, that a hipster with a fixed gear bike, drinking a fresh Frappula Frappuccino straight from starbucks could smoke a 500 HP lexus LS 600h in quarter mile drag race without even ruffling his beard.
You lost me at "blue tooth connection".
LMAO SAME
so many luddites.
@@jhoughjr1 so many people reasonably worried that the battery will run out, the transmitter or receiver will receive sufficient physical shock to damage them on rough terrain (or by falling over or running into something) and by loosing connection due to electromagnetic interference from any number of an ever increasing number of sources (or just dumb luck or some electronic hiccup) and also contributing to bandwidth crunch, and making it even harder to service in your garage when it inevitably breaks down as all systems subject to sufficient usage will eventually do because entropy is inescapable. What's more, looking that the mechanism, it could have been done with a mechanical linkage to a crank on the handle just like a conventional shifter that any idiot with some hand tools could fix given enough time and some spare parts. With this, spare parts are harder to install, much more expensive, and require specialized know how to install. Oh and every device that's a bluetooth receiver could track you and assholes could hack your bike. No thanks I'll keep my old bike until they make a version with mechanical linkage.
@@davidthomas2870 like he said, luddites
I think they mean why do you need a Bluetooth connection on a CVT. shouldn’t it be automatic?! Otherwise you’re shifting an infinite number of times to get from top to bottom!
Me at a Bike shop: "Um...Do you have a Continuously variable transmission that connects to Bluetooth for sale?"
Shop clerk: _What?_
And when it breaks; no mechanic on Earth will touch it, because it has a CVT.
🤗🤗🤗.
Make it cheaper and just buy a new one.
Hmm.. Maybe.
same as with gears in hub
@@RamoLasiaf ew
@@RamoLasiaf yeah just waste it all for more comfortable gear changing
Just like cars with CVTs
Advanced Transmissions: *Invents a thing*
Everyone in the comments: no
Correct
People who live in flat areas say no. People who live in areas with actual hills say, let's see how well this actually works.
lmao
@@SmallSpoonBrigade no we dont. 15 to 21 speeds is more than enough to adjust for the conditions.
Chris L i live in hill area and i say - nah.. never ...
"modern solution" to the problem we never had
To be honest, most things we use daily are solutions to problems we didn't had, or at least didn't know we had
Next: CVT on a can opener
😄😄😄😄
Came to comments to see if there was actually an issue which forced the creation of this to overcome it
was not disappointed, love you guys
one spec of dirt: im about to end this mans whole career
Who would turn their bicycle into a Ford Taurus with transmission problems?
Kevin Mael i think u mean NISSANS
@@c0r5e My sister had a 1988 Ford Taurus that was a POS.
Go karts have had these “torque converters” for years and some of them will take upwards of 50hp
@@Texas_Road_Warrior The engines will, not the transmissions...
You know millions of these are installed in scooters for like a decade now
I hope this was engineered for the fun of it.
Lh 010101 It’s an interesting problem with an interesting solution but yea there is no real practicality
@@bobloblaw1720 - This is a classic engineering solution looking for a problem, thus the sentiment of "hope this was engineered for the fun of it".
Why not real ? A “Variomatic” used in Scooter already long time :) if this Modell will be made a lot cheaper then Variomatic , why not to use ?
@@jb9282 - Weight springs to mind.
J B, most road bikes already have 22 gears, probably around 16 that don't overlap. Generally gears are spaced 7 to 10% apart. Worst case you drop to half gear easier than you want and slow down by 5%. Best case you drop to half gear easier and increase your cadence by 5% making you 0.5% less efficient to be pessimistic, so then dropping back by 0.5% in speed(less actually) to make up for it meanwhile putting less stress on your legs to keep them fresh later in the ride. So 0.5% less of efficiency is worth all this weight and complication? Really?
Imagine to ride this bike on the mud or sand... This mechanism will get stuck right away..
Or snow?
Ride it to work, leave it outside for 8 hours and come back..
It's all frozen and fucked.
My normal MTB doesn't like to work when it's cold.
Realised that around -36°C the brake cables won't like to move = no brakes.
That was my first thought too when I saw that mechanism. Even in less dirty environments I would expect the mechanism to develop issues in a short period of time.
I would presume the internal mechanisms would be environmentally sealed.
Same as how you wouldn't expect snow and mud to gum up into your cars transmission..
Don’t do that . That said it looks impractical?
@@lefyre1266 they would need to seal the whole mechanism to do that, the belt included
me: *knows that cvt stands for Continuously Variable Transmission*
also me: cock and vall torture
"Our next step... getting it from 37kg to just under 20kg."
Take a simple system and make it complicated . Problem solved
Because nothing was ever made better by being made complicated. I typed this on my phone which acts as a GPS, instant messenger, document reader, internet browser, video streaming device, and camera.
The thing is, nobody wants an overly complicated and likely very unreliable transmission on their bicycle! This thing also weighs a lot compared to a normal drivetrain.
@@A-rk3dn that's because those thing were needed....
And continues transmission on a bicycle is everything but needed..
Don't fix something that isn't broken
Where's the cup holder?
@Frank deluca there is no need for this
1. Doesn't look simple ,very complicated.
2.lot of moving part leads to maintenance.
3.it's not CVT.
Heavy weight too probably.
Rahul Todmal agreed. It's so prototype it's ridiculous. The balance of the bike is ruined too. Looks good for posing like most Lycra clad idiots.
1. It can be shifted continuous variable
2. It is complex, a generator + Motor would be better like this sadly dead-looking Gear2 Design from Denmark (got some Design price in 2010)
The more moving parts leads to loss of energy.
It looks like it has LESS choice than on modern bike!
At the very least, this is a great solution to make CVT's much more compact.
With existing CVTs I always felt that the cones are too flat. Lots of energy is wasted to squish the V-belt. You need a wide chain just to pass the force from one cone to the other and hope that is does not jam. Or you only have a narrow range of ratios ( like in many stationary machines and slow scooters ). I mean, people accepted full ICEs on their back wheels before Li Ion was invented.
I don't understand why they are trying to reinvent the wheel, Enviolo already made a super compact CVT hub for bikes
It's like how a Fresnel lens 'flattens' out a common lens. Neat.
there are gears that react to the speed of movement which creates centrifugal forces and that should be part of the invention
NuVinci has a pretty neat CVT for bikes and they have been doing it for more than 10 years.
nuvinci is truly the way to go
Low efficiency though, upwards of 10% of your muscle effort is spent friction-heating the transmission hub. Chain drive is 97-99% efficient.
@@michaelbuckers True, but when you have a powerful ebike, you won't notice it.
I have a Sparta M8i (Yamaha motor with 80nm of torque), which originally had a Shimano Nexus 8, but after converting it to a Nuvinci N171 (yes, its old, but so strong), it doesn't feel heavier, only difference is when you lift the bike physically (the hub is 1-2kg heavier).
@@ryank0261 dude ebikes don't need any transmission, just by using this cvt you reduce your range by 10-20%, speed and climb suffer too.
@@michaelbuckers "need" depends on the person. Some people would prefer automatic CVT-like transmission over 10% more range.
Wow, this machine already looks great.
where can i buy a bike with that?
@@SamSitar
And useless
@@itsourlife i think u missed the joke
Correct me if I'm wrong, but it appears that a little off-road mud kicked up into this device, and you're screwed.
Beltter have some chain And sprockets for that :p hehe
Thats the problem with a lot of the people in CA thats coming out with new tech. They act like because it works in the lab or a nice clean sidewalk that it'll work anywhere and everyone should get one.
sk8n barrow totally right
@@1wasinAlpha
Atleast my design is safe i have a similar idea but a drastically different approach.
Definitely a problem in the transition areas, where there's barely enough friction interface area to transmit the torque.
"On conventional systems you have to set the front and the rear" Dude hasn't got the memo about 1×
Cool as a 🚴♂️ 🚵♀️ , great engineering system
I think we get lots of problems when water, mud or soil enter.
Then seal entire system ¯\_(ツ)_/¯
But seriously - classic chain has the same problems. We just seal it with proper lube rather than with full casing.
Q:What is the added un-sprung mass by this system?
A: Yes.
Unsprung mass on bikes doesn't amount to much either way. You can be totally fine with 0 springs. But more rotational inertia is with no extra benefit is definitely bad
I don’t think there are any springs
Next week on Unnecessary Inventions, we look at fur covered sinks, gas powered turtlenecks, and bottomless backpacks
does the bottomless backpack work like a portable black hole ?
@@slevinhyde3212 no everything just falls out the bottom so you can get even more in....and in turn, out
@@Peron1-MC that's a true "inside-out" bag
Love the backpack
CVTs had a breakthrough in the engineering of agricultural tractors 25 years ago and that is where they actually make sense.
I invented this in 1997. Nice to see others forging ahead with it.
I think it's no longer a CVT, because you have only a set of ratios.
Michał Kmiecik I think you are right. When you have to manually select the ratio’s it is a VT at best
and from what i can see, if you dont operate the gear selector on the handle bar, it wont change gears...making it NOT a CVT
I mean, no - the discs can be pushed in variably, meaning all the ratios in-between are still there. And this is still a cvt, even if it isn’t automatically shifting. Cvt just means continuously variable transmission - ie, a transmission where the gearing ratios are continuously variable - no gear separation, clutch engagement, etc. the whole thing can be adjusted while under power, continuously, always being tuned to better suit the torque demand - whether that selection/adjustment is done manually or automatically
Stealth The Unknown I do not think so. Like you stated yourself CVT stands for continuously variable transmission. There is nothing continuously about manually selecting the ratio from the handlebar.
Rick Buitendijk Yes there is. The bluetooth connection between the handle bar and the gearbox is your adjuster. And the “continuously” part of cvt just means that there’s seamless transition between gearing ratios, like we have here
Possibly a brilliant answer to a question no one asked. CVT belt drive is not as efficient, and heavier than a normal chain drive. You also now have a need for electricity on a form of transport whose main advantage is freedom from outside power sources and the complexity of technology. If you actually ride a bike you will find that your legs get tired from pedalling more than your thumbs get tired from changing gears. That's why the efficiency needs to be in the drive train.
From an engineering perspective, this appears to me to represent some highly innovative thinking applied to a specific problem. As for the context of the problem - perhaps we're a bit hasty here. This is a prototype and it could prove the naysayers wrong in time. I say, give these guys a break - who knows what applications this elegant tech may have in other arenas. Cheers - Dave :-)
love you dave thanks for keeping it real
the idea of CVT is smooth changimg ratios, there you've got the overcomplicated version of usual chain system without smooth effect.
TT TASK FAILED SUCCESFULLY
Each disk/wedge can go in at an infinitely variable distance, so it is still a CVT and the ratios are still smooth.
You gotta really peddle fast to gain speed
Actually, the change IS smooth, that's the whole reason for it, however is it REALLY needed? Seems a small advantage which comes at a (literal) high price.
After seeing this: i love my gearless bicycle 😂
Soo you need an app and keep it charged just to shift. *SEEMS TO BE REALLY PRACTICAL*
Apple bicycle gear shifting.
Well, top-end wireless shifting solutions like Shimano Di2 or SRAM eTap operate like this anyway. The benefit for these systems is the speed of shifting, reduction of cables, options to have multiple shift buttons/leavers, which is very useful on road bikes and time trial bikes which offer lots of hand positions. Then, apps allow special customisation in terms of how the controls behave, or hybrid shifting where the front and back shift simultaneously to maintain smooth gear changes.
Its obviously not the most practical, but people opt for it for the features.
@@MishMash95 is there any reason why you can't simply have a basic application installed, with an optional subscription or single time purchase for both major and minor updates. I know Sony (example) has done this with numerous product lines, and I don't see them going out of business anytime soon.
road bikers will complain about the friction, mountain bikers will complain about reliability, bmx or trials doesn't need it. It comes on a proprietary frame too so you can't upgrade it. Overall, it serves no purpose in any disciplines of biking.
Edit: Even a commuter bike doesn't need it. It doesn't serve any purpose and no one needs it for any reason.
There are more and more "non-cyclists" on bikes with e-bikes and just city communting etc. These are made for short trips by people who otherwise wouldn't ride
@@getahanddown so why would you buy it then? It should be much more expensive than a regular gear drive. Not worth it if you use your bike only a few times a year
Overall, you can't discover how to make fire without trial and error. Maybe this technology is dead end, maybe not.
This solution has its downsides, but also potential hopes.
You need dedicated frame atm? We will see, maybe they will manage to downsize this system even more.
Who would use it? I can imagine commuters, tourists and training bikes for roadies. Basically anyone who's picky about cadance.
And if it will turn out to be dead end? Then maybe it will find use in other industries. Which would mean that cycling made the world a bit better yet again.
And as for "it's not needed" argument... well, your comment is kind of unnecesary too. But here you are.
It's a proof of concept. They're not trying to sell it, but if they can resolve these issues they could find potential uses.
Rafał Wyrwicki pfff most commuters don’t even use their gears anyway. This transmission is a terrible idea. If you are really that picky with cadence... even with how many gears modern bikes have... there are now 2x12 groups. How many more gears do you need?!
I prefer the old, classic transmission without bluetooth and shit, which i can easily fix on my own
Yeah.
"Did it break? Put the chain back on."
And make loss to manufacturer by removing expansive repairs. NO.
Very cool proof on concept. That q-factor is THICC
Very intuitive design! This is easier for me to understand than an automobile cvt.
it's huge, needs charging, breaks all the time like all electronics, and is not true cvt as it has selectable gears rather than 2 cones spreading apart. it's just pointless
You might be right however i wouldn't say that all electronics break all the time,there is consumer electronics and there is industrial/military electronics those are worlds appart both in quality and price.
Jandalf PL how often did your electronics spoil these days
Your right ,it's weak . OK for bicycle. But ,cars it won't take high torque. They can do better.
This is what we like to call "emerging technology" and "innovation". You don't understand that these clunky first generation products pave the way for further innovation and production of something better. You have to start somewhere, and this attitude of "oh it's big and stupid let's stick with chains" (which, mind you, are also very prone to failure) is toxic and prevents us moving forward with new technologies. If you don't want it, don't buy it, but I'm sure there is a market out there for such a product who are very glad this has come to be and are eager to see it evolve. The engineering that has gone into this transmission is very impressive and the engineers don't deserve to be dismissed because it's not perfect. And regarding it not being a CVT, the multiple speeds are necessary to suit multi riding styles. Some have strength and prefer higher gearing for higher speeds, some have speed and prefer lower gearing for more torque. Besides, not a single car with a CVT on the market is a true CVT. they all have gears because consumer tests showed people were uncomfortable with the engine holding a constant RPM. Subaru Outbacks, for example, have 8 gears despite claiming a CVT.
ROCKOCTANE because it wasn’t built for cars
*watching to understand the mechanism*
0:46 *closes video
Im a bike mechanic, and this is total bullcrap 😂, just get a Harmony nuvinci system ( almost the same)
I think this is a too little too late design also. Fallbrook Technologies already have nice systems for this, heavy but nice.
Reads continuously variable in title.....that’s deep
0:40 the voiceover and the image in front of my eyes contradict. They have not overcome the size issue at all! It's enormous!
Wait, what? Who said this system is small???
And it splays your legs apart. Oh my aching hips. And never mind trying to shift once you get dirt in there. Looks heavy.
Keep at it. Cheers.
It's just a working prototype...
And by "small" they probably meant "narrow enough to put inside rear triangle of bicycle frame".
@@RafaWyrwicki still, my scooter's cvt is more compact than this "cvt" and it's lighter and doesn't have all these easy to break parts. If Ii had a mill and a lathe, i'd have no problems taking an old scooter, taking out the transmission, making adapters for the cones (main issues would be the wheel hub and putting the belt on), getting the appropriate spring for the driven cone and there you have it, a cvt, on a bicycle, without the expensive and easy to break electronics.
@@GTAmaniac1 I think that big size is caused by wide ratio range and efficiency issue which is significantly lesser problem for a scooter. Funny thing about engineering is that solution that proofs its usefulness in one application (scooter) may be complete mistake in other (bicycle).
Oh yes...nothing to go wrong here. Precision equipment, open to the elements, I think this is a solution without a problem.
I think this is a proof of concept being criticised as though it's a final product.
I own a snowmobile, and a bicycle. Never once did I think it would be a good idea to put the transmission of the snowmobile on the bike.
Not even once?
The snowmobile drivetrain isn't sitting out in the open collecting debris in it's many moving parts like this monstrosity. Nuvinci have been doing a much better job on CVT bike drivetains for years and their stuff still barely sells.
I love new shift-mechanics😍no matter how crazy they are
That's some pretty wild engineering. Nice job on this it looks really cool!
One word that this won't ever work is "efficiency"
English you do not good
ANS YOU HAVE ONLY 50% OF ENERGY LOSS WITH THAT SYSTEM.
Not as simple as it should be for bicycle, I think. Thumbs up for mechanics, but not in place, imho.
For all those saying this solves a non-existing problem: Your view of cycling is too narrow, and you're downplaying the problems conventional chains and derailers have: High maintenance, frequent replacement of cassettes, finicky adjustment, fragile, and the dirty and hungry chain means trousers/skirts need to be protected. Derailers work well enough, but are not the best solution in every case. The inefficiency of CVT is largely irrelevant for ebikes. The simplicity in use of CVT matters, esp. for inexperienced and casual riders, particularly with automatic control, say for an electric rental bike. Enviolo has shown that CVT can work well for (e)bikes, and Gates have shown belts work well for cycling, with internal gears or singlespeed/fixie.
But this particular solution by Treadlie... it seems very complicated, open to water and dirt, heavy, limiting in what wheels/tyres you can use - and also appears dead. Their homepage is gone. Too bad, I could see it work well on rental ebikes if refined enough.
This looks expensive, heavy, & stupidly genius. I would never want a bike like this, but it's a cool showcase of the technology. But dam all those moving complex parts, that's a reliability issue waiting to happen.
The one problem I have with conventional systems is downshifting when going uphill. Based on my experience with CVT in a car there might be an advantage here, the issue however is cost (both dollars, complexity, weight, etc.)
This was "innovator of the year"? Did nobody else show up at all?
Noob - But why?
Engineer - Because we can.
It makes sense, the newer generation don't know how to drive a manual and don't know how to change gear on a bicycle. Good job, you've made a "time saving device".
It’s a wonderful idea, if the weight, simplicity, ease of manufacture and reliability can beat the chain n sprockets, then it will change the game..for us Cyclist 👍 keep up the good work..love your idea.
As a cyclist, I know that this thing is going to have exactly 2 gears. Damm I'm strong and up hill.
It may have more if they put a dial with red lines on it
Haha lol
Using v belts for bicycles, and motorcycles are really inefficient. Lot of drag. Metal to metal chain and sprockets are better
silveribis55 And rubber Belts dry rot too
@@caderamsey8878 true.
@@caderamsey8878 and metal chains and sprokets wear out...
Raymond Ager Yeah, That With happen for a while with the Metal chain. Rubber dry rots quickly, if that Rubber chain sits out in the weather for a while, and it’ll snap in no time. I’ve had my bike for a long time, Chain still works just fine. My neighbors bike that sit in the woods for 5 years Had many issues, but the chain wasn’t one of them. It’ll take a looooong time to take a metal chain to wear out like you mentioned.
@@caderamsey8878 I think chain wear depends very much what type of bike and what type of riding. Moutain bike chains and sprockets can wear fairly quickly if used a lot on wet, gravel surfaces. I made the comment simply because stating that rubber belts rot, implies that metal chains never wear out, which isn't the case.
I think the important thing is to realise just how crude early derallier sytems were and how they have improved over time. I sure other drive train systems could also improve, given time to develop.
A very good attempt has been made in developing this amazing CVT 'drive'. They have also made the gear-change-control part of it wireless which means you are just one step away from autonomous gear changing - an on-board ECU that selects the correct gear ratio according to the cycle's roadspeed and possibly the option to manually kick-down a gear when needed for extra power such as for going up hills.
It is unbelievable!!! Congrats! Why cannot we see them in shops already?
Bro wtf
It's illegal to be this cool
Amazing stuff! But this type of complex engineering = expensive af.
Good invention. The belt is nice. The gearBox seems large.
There were internal gearBoxes for bicycles for a long time.
Not sure what the benefit of this new mechanism would be.
Maybe it has a market for some type of bicycle.
This is really cool but WHY IS IT WIRELESS???
Cool? You actually think it's cool? You have a long way to go, Grasshopper.
@@timhofstetter5654 shes kinda cute dont it?
@@jamescrock2213 8) 8) 8)
@@timhofstetter5654 wot
@@compjelly Wot wot?
Wow, that looks so compact for what it is.
Awesome. I hope it's available and cheap so everybody can enjoy
A gearbox like Pinion or Effigear is the future. Not this over complicated, delicate looking complexity.
How it behave with rain, dirt and mud?
All you have to do now is to paint those hubs black in stead of bright white. Then put a whole sealed guarding all around the system, to keep the water out, let alone frozen mud.
Then you Have to take the Blu toof shit off, and make the damn thing shift by itself, using no electric power. Make it so a 350 lbs weight lifter dude can push that thing to its limits, and not break. then make it under $250, with a no hassle, absolute life time warranty, so people would actually buy it.... Just sayin'
@@jakefriesenjake or just put a cassete and chain on it :^)
I'd rather ride a bicycle with chain transmission and japanese dynamo hubs.
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I love how they flex that you only have to change the front sprocket and the rear reacts like it’s a design choice that they brought to the user but in reality it is required that it behaves like that otherwise the belt will lose tension.
I love my Bike and my Steel Chain. I think that CVT is not that profitable. And mud,soil may cannot be removed easy. Thanks!
Kenth:
You are right, this shit sucks😂
actually that is the best part about this system, it is belt driven. Belt drives are unaffected by water and mud etc.. while that rapidly wears out a conventional chain.
However this system still sucks because it is way too big, overcomplicated, expensive etc and doesn't seem to actually perform the basic functions a CVT is supposed to.
I’ve always dislike the use of CVT transmissions in automobiles. Having it on a bike is a pretty cool idea. Looks like the gear shift is a lot more precise and smooth. The issue with the CVT system on automobiles is the belts don’t last nearly as long as gears with heavy use. I’d be curious to see how well the belts perform along side bicycle chains.
Ah yes, the Bluetooth bicycle!
Yup, CBT is officially cool now.
How much does it weight, you say?
Can we just stick to a chain. Please. Bikes were made to be simple and easy to work on. Not the opposite...... "#innovation"
*cough* DI2 *cough* hydraulic brakes *cough* internal gear hubs
Rafał Wyrwicki internal gear hubs were invented before the derailleur was
@@AlexanderKorotkov42 Are they "simple and easy to work on"?
@@RafaWyrwicki Hydraulic brakes are.
@@edism With practice/patience and proper tools - yes. However I wonder if you would say the same in case of cable fail on trail.
My point is - if one is afraid of innovation, there is nothing stopping him from riding fixie/ss. Everybody can ride on whatever they want.
And when I hear "don't use that, i don't like it", I'm like "... who do you think you are? my mother?"
no thanks I still prefer chains, chain rings and cogs
Oh great now even my bike will be going through transmissions and breaking down all the time.
Rip. ):
It sounds like a Ford Torres
This is human power man, efficiency matters, chains are best
This was ahead of its time, the wireless shifting.
Failed in cars and will fail in bikes. Far too much efficiency loss, which is much worse than the losses of shifting between conventional gears.
Cvt's didn't fail in cars, they recieved a lot of backlash because people are so used to the feel of shifting that they didn't like not shifting. They were also more prone to fail on some brands initially.
In bikes I feel like this really doesn't have a place due to the weight, complexity, size, etc. But I think this was probably just a proof of how small they could get a cvt which is reasonably impressive.
the bicicle is what it is because is cheap end efective, why spending gazilions on sa thing like this?
Obviously, you are not a hard-core cyclist. Bikes can go for more than $10,000.
@@AndrewUnruh if you are a hard core cyclist you concentrate on your condition, not on your bycicle, in this case this bycicle weights at least 15 kg!
@@alecsgsx it's a prototype. Cvt is a good idea tho, but this implentation is nothing smart. I actually thought it was something new.
@@AndrewUnruh hard core cyclist doesnt solely on bike price but performance and the cycling art itself as well as their physical capability as a cyclist
alexandru p hard core competition cyclist focus on every single detail of themselves and the bikes, you're just trying too hard to appear like smart critics
Bluetooth?
If it lags , you will lose your legs
# no pun intended
How many moving parts again?
There is a bicycle CVT transmission called the NuVichi transmission which is actually commercially produced. It is a completely different approach to the problem which is more elegant than the traditional approach of CVTs.
Indeed, so far it's the only bike transmission that i give a change in succeeding. And truly CVT.