I installed the NuVinci last week. Built my own wheel, no problem with the install. My question is: Can I Keep my 9 Speed front with the Variable speed rear? I had to install the 9 speed cassette on the front with a piece of all-thread sawed off to length and hammered over on the end to lock it in place. I have a little trouble shifting the front while climbing, but so far I only throw the chain 2 or 3 times a ride. I get lots of looks at local rides.
What an interesting concept and implementation. I am always amazed by the ability of product design engineers to dream up new technologies. After having driven clunky Shimanos for life, I had almost given up on this being a possibility. Would love to try this out. Kudos to the developers.
The only drawback of Nuvinci is it's fairly small gear range (380% on Nuvinci N380). While with a derailleur you can have 600% (on a 3×10 drivetrain) gear range.
I have never been able to figure out all of the gears on a derailleur system, that's why I ride a fixed wheel bike, which is great, because I have never been able to figure out all of those brakes either.
If there was a nuvinci hub that doesn’t need to be attached to the tire that could be mounted on tricycles that had a gear hub between the axle and pedals I’d definitely get this product and install it as my gear system for my adult pedal car, my 4 wheel ebike whatever you want to call it cause this would be awesome
I've seen where the 380, under continuous load, like going uphill, will start to overheat. The impact will be that the wheel will stop free wheeling, meaning, if you got off the bike and turned the wheel by hand, it acts as though the brakes are partially on. The internal parts starts to overhead.
CVT's in general have massive advantage over geared transmissions because they allow an engine to stay in the power band regardless of wheel speed. The Williams-Renault CVT-equipped F1 car was so set to dominate the league before it was banned in 1994.
it doesn't look so complicated since this are staged planetary gears. Just disassemble in the same order its assembled and vice versa. its basically a cordless drill gear.
Very nice, but NOT an "infinite" number of gears, as the salesman stated. I'd love to see the internal mechanism. I drafted a patent application for a seamless planetary geared shift system that is also within the hub and COMPLETELY mechanical (no sensors whatsoever). This NuVinci invention seems to be able to adjust how fast (or hard?) one pedals before shifting to the next gear - impressive, but probably requires a sensor and thus a battery.
Let's just say that this gearbox is very different from what you describe. First of all it doesn't use gears, and it's not a automatic transmission in it's base form. I'm not even going to try and describe it but point you to this video: th-cam.com/video/vGs1nrXaZsA/w-d-xo.html As I see it there are things about it that I'm not enthusiastic about, such as the friction between the planets and the drive surfaces, or whatever you should call them. Until we know how it stands up to long term use I'll stay a skeptic.
Thanks Blahorag ! With the invention I mentioned, there is no need to shift ... in fact YOU can't. It's totally automatic. I think you have a good point about wear, etc. as it seems the Co never came to market with the product. It's a shame because it's fantastic (I rode a prototype). Enjoy your rides bro !
Weight yes, maintenance not exactly... it's sealed and not supposed to need any kind of maintenance whatsoever for a long time. The downside is if it does break, or you do go enough years with it, then yes - you will need to get it serviced by a specialist.
Any sprocket drive system can be adapted to bet drive yes. There are bikes with NuVinci and belt drive already. fat-bike.com/2012/06/nuvinci-n360-gates-carbon-belt-drive-fatbike/
The problem with this is that there really isn't much of an advantage over traditional gears and any internal hub can switch gears at a stop. This thing is heavy and it really doesn't help much. This would be much better in a car with a far wider range. The range of gearing isn't any better than any other internally geared hub, With a much more potent engine and a much wider range, an IVT would be good, but I don't think this is any good which is why it's been on the market for years now and almost nobody uses them.
+christo930 Here in the Netherlands, they're actually selling quite a few bikes using this system. It's rather expensive though, so it's usually reserved for seniors (instead of students), often in combination with an electronic bike.
I don't like the way he describes traditional gear sets as "a big concept" like his customers are too dumb to understand how to shift gears. Then he threw in how a twist shifter is "as easy as adjusting the volume on your radio," just in case we needed clarification on how to turn a knob. Really, man? And the gear indicator looks like it was made for a child's toy, otherwise the illiterate customers wouldn't be able to figure it out, right? Obviously his pitch was aimed towards people that rarely ride who are interested in commuter cycling, but he sounds like he's talking to a toddler.
As well twist shifters are not as ergonomically pleasing as a Di2 tap up/down shifter, even a trigger shifter might be more pleasing than that old school motorcycle throttle twist technology. I know what I'm talking about because I have taken a test ride on a NuVinci. Seems too heavy for any performance advantage...
The disadvantage is weight, and probably the torque it can handle, and the limited gearing space. Maintenance is 0, because if it breaks, you replace it. No oil, no nothing, because it will ruin system.
I am the original designer of what is being promoted here as the Davinci CVP gear hub. It will be found to be a very robust and reliable gear hub. My questions are: How did my design material for this hub get to the US... and by who?
First of all if what you say is true, you do have a patent on it don't you,if not sorry but it's your own stupidity(no offense).....but if you do ,i would sue the hell out of them,and if you have the patent ANY lawyer will take your case cause it would be a slam dunk.
why adding new technology to something that is perfectly fine the way it is. an average person can learn how to shift gears in a minute.. if you make bikes get faster the risk of accidents increases too. if you increase how effective they are, you reduce the force needed to ride them. but they are supposed to make you use some force, thats why its considered a healthy sport. don’t see the need to spend more money for such “improvements”. if im to lazy for a normal bike one day, i buy a motorbike. Edit: if you want to improve something on bikes, improve their lifespan (no rust, stronger chain no flat tires,...). but that wouldn’t bring much profit, wouldn’t it?
The NuVinci N380 CVT requires little to no maintenance and won't get clogged full of dirt and mud. Paired with a Gates carbon belt drive, my bike is bullet proof... I no longer have to worry about my derailleur becoming tangled in the brush or damaged from hitting something. No need to lube chains anymore, because I am running a belt drive. Just a quick pressure wash, after riding and I am done. I spend a lot more time riding now, then I have ever... Due to the lack or need for maintenance on my bike. Cost for the whole setup was less then the cost for quality gear sets, about $700 all in.
I installed the NuVinci last week. Built my own wheel, no problem with the install.
My question is:
Can I Keep my 9 Speed front with the Variable speed rear?
I had to install the 9 speed cassette on the front with a piece of all-thread sawed off to length and hammered over on the end to lock it in place.
I have a little trouble shifting the front while climbing, but so far I only throw the chain 2 or 3 times a ride.
I get lots of looks at local rides.
lol
What an interesting concept and implementation. I am always amazed by the ability of product design engineers to dream up new technologies. After having driven clunky Shimanos for life, I had almost given up on this being a possibility. Would love to try this out. Kudos to the developers.
You can't argue facts until you've ridden one. It's awesomely smooth.
The only drawback of Nuvinci is it's fairly small gear range (380% on Nuvinci N380). While with a derailleur you can have 600% (on a 3×10 drivetrain) gear range.
You can still put a speed drive on the front if you remove the front derailleur.
I have never been able to figure out all of the gears on a derailleur system, that's why I ride a fixed wheel bike, which is great, because I have never been able to figure out all of those brakes either.
3 on the back and nine on the front.......this guy couldnt sell a heater to a eskimo.
I am working on putting one of these on an old moped.
It would be perfect for like a Puch Magnum or a Minarelli.
and couple that with the tabbed belt drive would be sweet
Is the anti rotation washer for vertical drop out included,the majority are using Vertical drop out.
what is the lowest and highest gear ratio?
If there was a nuvinci hub that doesn’t need to be attached to the tire that could be mounted on tricycles that had a gear hub between the axle and pedals I’d definitely get this product and install it as my gear system for my adult pedal car, my 4 wheel ebike whatever you want to call it cause this would be awesome
Wow, this is really amazing !!!
What is the power loss compared to straight chain and gears?
パンク修理の時後輪を外すのが面倒そうだ、長距離ツーリングに使うにはテンションプーリーをつけなければならない。 できればカセットフリーに付けられる無段変速システムが出来るとありがたい。
How does the range compare to an 11-36 10speed cassette?
How does the ratio range of this compare to that of a conventional 21-speed?
21 speeds I would say have a range of about 470% this hub has a range of 350-360% depending on the model.
Berapa harga nya girnya boos terus pesen di mana
I've seen where the 380, under continuous load, like going uphill, will start to overheat. The impact will be that the wheel will stop free wheeling, meaning, if you got off the bike and turned the wheel by hand, it acts as though the brakes are partially on. The internal parts starts to overhead.
how much does it cost?
@0:54s I've never come across a bike with 9 gears on the front!
I believe he really meant to say 9 gears on the rear and 3 on the front.
Anthony Toste this is true.. but still a fail sentence haha
On the front, what have you been sniffing?
So it's a product for idiots that forget to shift before a light and get confused from having 2 sets of gears?
Gara Von Hoiwkenzoiber
Yes, for idiots.
CVT's in general have massive advantage over geared transmissions because they allow an engine to stay in the power band regardless of wheel speed.
The Williams-Renault CVT-equipped F1 car was so set to dominate the league before it was banned in 1994.
it doesn't look so complicated since this are staged planetary gears. Just disassemble in the same order its assembled and vice versa. its basically a cordless drill gear.
I like this. However, it appears like one has to turn the grip a too wide angle from the min to max gear. This need to be reduced.
What is power lost and ration?
Very nice, but NOT an "infinite" number of gears, as the salesman stated. I'd love to see the internal mechanism. I drafted a patent application for a seamless planetary geared shift system that is also within the hub and COMPLETELY mechanical (no sensors whatsoever). This NuVinci invention seems to be able to adjust how fast (or hard?) one pedals before shifting to the next gear - impressive, but probably requires a sensor and thus a battery.
Let's just say that this gearbox is very different from what you describe. First of all it doesn't use gears, and it's not a automatic transmission in it's base form.
I'm not even going to try and describe it but point you to this video: th-cam.com/video/vGs1nrXaZsA/w-d-xo.html
As I see it there are things about it that I'm not enthusiastic about, such as the friction between the planets and the drive surfaces, or whatever you should call them. Until we know how it stands up to long term use I'll stay a skeptic.
Thanks Blahorag ! With the invention I mentioned, there is no need to shift ... in fact YOU can't. It's totally automatic. I think you have a good point about wear, etc. as it seems the Co never came to market with the product. It's a shame because it's fantastic (I rode a prototype). Enjoy your rides bro !
No sensor no battery. All mechanical. Lots of videos out there. Watch one, be enlightened.
How much you paid for patenting?
Weight yes, maintenance not exactly... it's sealed and not supposed to need any kind of maintenance whatsoever for a long time. The downside is if it does break, or you do go enough years with it, then yes - you will need to get it serviced by a specialist.
how much does it cost/hub??
300-500
can it be belt driven???
Any sprocket drive system can be adapted to bet drive yes. There are bikes with NuVinci and belt drive already. fat-bike.com/2012/06/nuvinci-n360-gates-carbon-belt-drive-fatbike/
@@SeattleRingHunter EVELO.
To me it about the same as Torotrak or Toroidal in over all on how it works so what so great about that and lack a reverse.
Name all the bikes that either already have or need a reverse gear.
no disadvantages? too good to be true.
I believe it is fluid-coupled meaning that there is some power loss in the transmission. Maybe 10-20%.
The problem with this is that there really isn't much of an advantage over traditional gears and any internal hub can switch gears at a stop. This thing is heavy and it really doesn't help much. This would be much better in a car with a far wider range. The range of gearing isn't any better than any other internally geared hub, With a much more potent engine and a much wider range, an IVT would be good, but I don't think this is any good which is why it's been on the market for years now and almost nobody uses them.
+christo930 Here in the Netherlands, they're actually selling quite a few bikes using this system. It's rather expensive though, so it's usually reserved for seniors (instead of students), often in combination with an electronic bike.
They probably are pretty decent when using a mid-drive electric bicycle. I would agree there.
@rckrstmr about $350. You may need a different frame to.
No maintenance my ass LOL
I don't like the way he describes traditional gear sets as "a big concept" like his customers are too dumb to understand how to shift gears. Then he threw in how a twist shifter is "as easy as adjusting the volume on your radio," just in case we needed clarification on how to turn a knob. Really, man? And the gear indicator looks like it was made for a child's toy, otherwise the illiterate customers wouldn't be able to figure it out, right? Obviously his pitch was aimed towards people that rarely ride who are interested in commuter cycling, but he sounds like he's talking to a toddler.
As well twist shifters are not as ergonomically pleasing as a Di2 tap up/down shifter, even a trigger shifter might be more pleasing than that old school motorcycle throttle twist technology. I know what I'm talking about because I have taken a test ride on a NuVinci. Seems too heavy for any performance advantage...
this is American way of speaking ( sales method ), talking like customers have no clue and as if divorced from life.
So Americans speak like salesman?
even flying 90 miles down the road without coming home with a broken arm!?
Yifter the shifter
The disadvantage is weight, and probably the torque it can handle, and the limited gearing space. Maintenance is 0, because if it breaks, you replace it. No oil, no nothing, because it will ruin system.
Ko bhi videsi bike(Cycle) ho main usse acchi aur ball-bearing ukt smooth running bike Bana Dunga.
I am the original designer of what is being promoted here as the Davinci CVP gear hub. It will be found to be a very robust and reliable gear hub. My questions are: How did my design material for this hub get to the US... and by who?
First of all if what you say is true, you do have a patent on it don't you,if not sorry but it's your own stupidity(no offense).....but if you do ,i would sue the hell out of them,and if you have the patent ANY lawyer will take your case cause it would be a slam dunk.
NuVinci hub will lighten up your ride, since it will empty out your wallet. That is much less weight to pedal around.
why adding new technology to something that is perfectly fine the way it is. an average person can learn how to shift gears in a minute..
if you make bikes get faster the risk of accidents increases too.
if you increase how effective they are, you reduce the force needed to ride them. but they are supposed to make you use some force, thats why its considered a healthy sport.
don’t see the need to spend more money for such “improvements”.
if im to lazy for a normal bike one day, i buy a motorbike.
Edit: if you want to improve something on bikes, improve their lifespan (no rust, stronger chain no flat tires,...). but that wouldn’t bring much profit, wouldn’t it?
The NuVinci N380 CVT requires little to no maintenance and won't get clogged full of dirt and mud. Paired with a Gates carbon belt drive, my bike is bullet proof... I no longer have to worry about my derailleur becoming tangled in the brush or damaged from hitting something. No need to lube chains anymore, because I am running a belt drive. Just a quick pressure wash, after riding and I am done. I spend a lot more time riding now, then I have ever... Due to the lack or need for maintenance on my bike.
Cost for the whole setup was less then the cost for quality gear sets, about $700 all in.
nuvinci was fine until i had a flat. hello nexus 8.
these americans....now they need CVT transmission on their bikes!
weight
It's a scam it doesn't work !!!!!!!