Are Straight Pull Spokes Strong Enough For Trail Riding? | Ask GMBN Tech
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- เผยแพร่เมื่อ 3 ก.ค. 2024
- Will mountain bikes with wheels laced with straight pull spokes be able to cope with aggressive and demanding trail and enduro riding? Can you mix SRAM and Shimano disc brake callipers and rotors? Is there such thing as too much grease on your MTB bearings? And what exactly is a star fangled nut?
Doddy is back to answer all of your mountain bike tech related questions in our weekly Ask GMBN Tech 🔧
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0:18 - Can you run SRAM brakes (levers and calipers) on Shimano rotors?
1:39 - Is it normal to blow through 160 mills of rear travel on a 2 foot drop?
3:30 - Is there any disadvantage of overspending grease in a headset?
5:08 - What's the purpose of the star fangled nut?
6:58 - My suspension linkage bolts keep loosening after ever ride even after proper tightening.
8:12 - Are straight pull spokes/hubs suitable for abusive riding? Are they better than J-bend spokes/hubs?
you da real mvp
someone give this man a job at gmbn
Legend
Thank you for lords work
Oh my gosh, I think I was happier being daft. My mindset as a child, "get a bicycle, and ride it". Now it's all, "jibba jabba, jibba jabba; is there enough grease in my hubs? Is every spoke the same tension? How long are my cranks?"...........I think I've fallen into the knowledge pit of doom. I like the saying, "don't sweat the small stuff".
As a guy who builds all the wheels he rides, straight pull eliminates the tedium from lacing, which makes it worth it to me. Shimano's new Scylence hubs offer both 32 and 28 hold sp options.
my favourite example of strait pull spokes are the ones industry nine uses
I love GMBN Tech. Thanks Doddy.
One other advantage of straightpull is you can replace a broken spoke without having to remove the disc or the cassette
And if you have a wheel like Race Face Turbine R, with asymmetrical rims and different flange sizes, you just need one lenght of spoke on both sides :)
Thanks for the extra point!
@ not sure that's right ....
@@leoelkins3664 Thats how my race face turbine r wheels work.
@ I think maybe it's all dependent on the flange sizes and assymetric rims like you said, you'd still need different spoke sizes if the flanges are larger on one side. I guess your rims match your hubs, so the flanges have been designed to work with the assymetric rims
Wow thanks Doddy!
Didn't think you would answer a second question of mine!
Cheers Doddy
Thanks for answering the spoke question! I've been looking around for DT 240 hubs, my local shops sell only the 28H option of the StraightPull and the 32H version of the Traditional. That got me wondering whether StraightPull is so much stronger, that the number of spokes can be reduced? However, later I found that DT (on their site) also list a 32H version for StraightPull and that is, I think, what I am going for!
I have pro4 straight pull mtb hubs with sapim spokes and ztr rims. Strongest I ever had quality of the hub is sooooo important. Plus on internet you can order any sort of spokes you want in less than a week delivered so this is not an issue
One other issue with straight pulls are the hubs available seem limited to 28 spokes - that's quite a reduction from standard 32, much less beefeater 36H. They are the way to go except for that - and offer easy spoke replacement.
I run shimano ice tec 203 rotas for years with Guide brakes and now the new codes, yes a spacer is used below cone washers. I do this as I found sram disc would warp as I only run sram sintered pads and they also hold heat longer and would burn my shin if wasn't careful but the ice discs stay cool.
also some straght pull spoke wheels are a pain in the butt to aline because when you turn the niples somtimes the spoke itself is moving with it, so to tight or losen the sopke, you have to clamp it some way and this may damage the spokes and will take a signifacantly more time than some traditional spokes
i have some mavic cross-link wheels and i hardly aline them for these reasons
2 Questions. .. would going from 19 to 21mm internal width on my 27.5 wheels make a noticeable difference? 2nd... what kind of difference would it make ride, width and weight wise going 19 to 29mm internal running a 2.3 DHF front & 2.4 Ardent rear
Hi Doddy! Love the show! I am on the market for new hub. New XTR 9100 appeals to me most with its silence technology. My question is can I replace micro spline to be compatible with HG standard? Any adapters?
It's Franky Town xD! Thx for answering
Doddy, you forgot to mention not to put grease on the steerer tube and stem when assembling the headset.
I think of myself as a knowledgeable MTB rider and tickerer. I ride a 2018 Santa Cruz Nomad and race a variety of enduros and DH in the Pro class here in the east coast of USA. I currently run a tire combo of a maxxis exo up front, and a DH casing in the rear. My question comes from the rise of the tire inserts. Would a exo tire and a cush core out back be as reliable as the dh casing I'm used to. I LOVE the feel of Exo tires but get so tired of buying tire plugs and Co2 for rear flats.
#askgmbntech How to check rear shock bushing? How to know it is wear & when to replace it? Any maintenance tips for the bushing?
Re the question re loosening bolt on the Spesh, why would you want to keep riding a 25 year old DH bike? If it's a 25 yr old 10 speed or fixie, with new tires, then OK. But DH?
Hi Doddy,
just wondering if you could explain how halo's 6drive and supadrive work. I have a vapour 35 supadrive (rear) and cannot fault it but just wondering how they differ to other hub manufacturers like dt and mavic
I put a new chain and derailleur on my bike it shifts perfect but when I put the power down the chain starts cracking/slipping does this mean I need a new cassette
this would be way better with timestamps
Good to know!
I Think i would watch every episode than :D
is the Santa cross nomad bike wirth 3000
#askgmbntech Hi Doddy, can you tell me if having a spare tube in my backpack for my tubeless have any sense? I often heard we have to have one in case of very big tear or if we smash the valve. But my tire is full of bramble thorns, my tube will die instantaneously when inflating. Thanks for any advise.
#askgmbntech One thing currently stopping me progressing is knowing what my bike can handle. I’ve got a Nomad 4 C XL, the fastest lines on tracks near me have huge drops to essentially flat. I’m 90kg, how far can I drop to flat before I ruin the bike
#askgmbntech Would a one-by chain guide work with an E Thirteen TRS+ Double crankset set up as a one-by? Will the chain line be okay on a pre 2005 Santa Cruz Bullit? I currently have Shimano fc-m572 cranks.
#askgmbntech I've got a Manitou Mattoc Pro 2 fork and have recently installed their Infinite rate Tune negative spring. The negative spring has to be set at least 10 psi higher than the positive spring. Will the negative spring have any effect on setting up the sag on the fork?
#askgmbntech I am wondering what the pros and cons are between alloy and steel chianrings? does it effect chain wear? -cheers
Here is the real answer to running shimano rotors on sram calipers. You can, but it’s not advised. It’s not necessarily the thickness, it’s the rotor brake track that is different. Shimano is narrower than sram. So over time the rider will notice in even wear. And you will find yourself replacing the pads more frequently. There are tons of forums that discuss this, and they all say what I just commented. Short term you can do it, but longer term effects aren’t worth it. If you want ice tech rotors just get shimano brakes or buy SRAMs version.
#askgmbntech
Hi Doddy. Do you reduce air pressure in your shocks and tubeless tyres when travlling by aeroplane? Im off to Rotorua at Xmas and have heard mixed views on this for flying. Cheers and hope to see you guys in OZ and NZ some day soon!
#askgmbntech My hub used to make a loud buzzing sound but after my last ride and bike wash, it became silent (in a pin drop room, you may hear some buzzing). I don't have any problem while pedalling forward but when I try to pedal back the crank rotates as if there is no chain on it. What could be the issue here? do I need to change my hub??
#askgmbntech Hi, I have a problem. When I move my wheel from right to left and holding the frame I can hear sort of knocking. I think that it could be some stuff from the rear hub. Could you help me how to fix it? Thanks a lot.
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#askgmbntech where did you get the 10mm reach stem from in the cut scene for gmbn? I've searched everywhere, mondraker don't even do them anymore
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Can you do a review of a fake vs real rear mech
#askgmbntech why do my rear gears select ok yet i get slip when i put force on the highest gear only. getting stuck I've checked the chain, indexing and sprocket wear but can't fix the issue. any ideas?
#askgmbtech hi doddy I've got a cerrera vendetta and everytime I have puncture I can't get tyre on or off am even using moto x tyre levers which are no help it's a plus bike also I can't have any air in the inner tube otherwise tyre won't go on please can you help as I don't want to get stranded out on the trails
#askgmbntech can you fit a larger travel shock to your bike and can you explain the size and travel of a shock thanks
I9 right down the road from me, and they look bitchin. However, it just comes down to what my checkbook can afford at the time :(
#askgmbntech hi doddy, Im currently studying for my university exam and currently running a cube aim sl with a crappy sr suntour fork. Right now Im saving money for a better bike to buy after the exam so a new fork is out of consideration. Fork has a problem of being flexy under braking. It vibrates violently that I lose control. Any solution for this fork ? Thanks.
#askgmbntech my sons got a carrera detonate 20 and forks are poo, can you point me in right direction of some light air forks with disk mount please? Thanks
Hey Doddy, enjoying the show. What do you think of upgrading the travel of my fork from 150mm to 160mm at my Canyon Spectral 2016? #askgmbntech
Hey McSchwabl, you shouldn't have a problem there. You'll get a little slacker head angle and the bottom bracket will raise a bit, but it won't make that much of a difference.
Thank you :)
#askgmbntech Hi guys. I have to do a lower leg service on a 2018 rock shox Pike and I can´t find the RS 0w-30 oil where Ilive. What other oil can I use?
#askgmbntech Howzit Doddy. Why do my cranks keep coming loose? Its gotten to the point now that I need to tighten the bolt (quite a bit) every time before I ride. I'm tempted to use blue Locktite but I suspect that there may be a different problem than just the bolt coming loose. Any advice?
Hey Mark, it's hard to know exactly what the issue could be without knowing the type of crankset you have. As a first port of call, we'd suggest asking your local bike shop what they think.
If you hit the cranks hard on a rock, or many small hits over time, there is a chance the threading has begun to strip which is why it likely isn't holding after you've tightened it. Pretty common in cranks for the threading to strip. Like the gmbn guy said, your bike shop can fix you up. If it's the threading, they can fix you up for less then $50 for sure.
#askgmbntech Hi Doddy, I have the Voodoo bizango 29 2018 and what love to upgrade the a tyres on it, what is the maximum tyre size I can fit on a 23mm internal width rim, thanks
*would love
I'm not sure, but be aware that your frame will only allow so much tyre width, which is often the limiting factor. So my rough guess would be, whatever size the frame fits is the maximum size you can use on those wheels.
However, on some bikes the wheel rim width will be the limiting factor, for example where a boost fork has been used for greater stiffness with standard width tyres.
#askgmbntech Can a non Dyna-Sys shifter be used to control a Dyna-Sys rear derailleur?
Hi gmbn tech, I just got a Scott genius 720 plus 2017. I really want to buy some hope pro 4’s or halo vortex wheels however. The bike came with center lock disks, am I going to need to buy new disks as well?
Yes unless the hubs are centerlock
@@michaelpidsadny2379 thanks mate. I almost bit the bullet and ordered a set last week it's a good job I noticed haha. It's a boost bike do I need those ring spacers to line the disk up?
@@jamestyrrell2225 hope sells an adapter kit so that you can use a non boost wheelset with boost dropouts. Unfortunately you won't get the extra wheel stiffness from boost if you go down that route. If you can find a boost wheelset for your boost bike, that is the best option:)
@@michaelpidsadny2379 very friendly of you to give information on here I appreciate that mate thanks! Hope do make a pro4 boost enduro wheel and the halo vortex comes with boost too, so thanks a lot 😁
#askgmbntech Hi, love the show.
I also have a question, I'm asking for a friend. He's got a kona with a santour 120mm fork, can he upgrade to a 120 mm rockshx fork?
Septem / Roptem brand doesn’t matter. Make sure he gets the same type of headtube. It’s either straight or tapered
@@ROBinJVILLE oh ok. Thanks mate
Septem / Roptem no worries. Although I should of said steerer tube.
hello doddy, my trek fuel ex 8 2017 29er has 130 mm suspension front and rear, can i use this bike for drops and trail jumps? can this bike take a beating?
LOL how'd you end up with a fuel without knowing what it can do?! Yes bro, once the suspension is setup correctly, you can do all the drops and jumps you'd like. That's what it's meant for, it's a very serious trail bike.
@@LithicKing it was a christmas gift last year. anyway thanks for the advice! now i wont hesitate doing drops and jumps
@@andrenighthawk4431 quite the gift! Enjoy it, it's up there with the best of them. But remember, just because the bike can handle it doesn't mean you can! Don't go for the biggest thing you can find first! Haha.
@@LithicKing I'll try small drops and small jumps first to gain confidence before hitting out big ones
#AskGMBNTech Hi guys I have an SR-Suntour Epixon 120mm air fork on my hardtail. If I hit some jumps on normal air pressure (80 PSI) the fork gets compressed all the way. When I go on hard air pressure (120 PSI) it's too hard and not comfortable but the fork doesn't compress all the way and there is still 1 cm of travel left. My question is if my fork gets damaged when it compresses all the way and how I can setup my fork so that it's comfortable and doesn't get compressed all the way. Greetings from Germany :)
It's an air fork. Your meant to set the pressure in relation to your weight. It's not like tire pressure which is personal preference. If your saying at your weight, it is supposed to be set at 80 psi, then I would suggest bumping up a little bit to 90 psi (to make sure your accounting for all of your riding gear), and then buy some volume spacers. Add 2-3 spacers into the fork, and you should no longer bottom out. That's a good fork you have there, just needs a few small tweaks. Good luck.
#askgmbntech what hybrid tires would be best for trail riding ?
If a rim was bent but trued, how long before you need to replace that rim with a new one? Or can you ride the same way on that once bent rim or not that rough and recommend getting new?
#askgmbntech hi there , what are the pros and cons of larger disc rotors and smaller disc rotors? And i want to get a fast rolling tyre for my rear wheel and i was thinking of getting a high roller 2 or minion ss or do you have any other recommendations ? thanks alot!!
Hmm, I'd say: larger discs have better braking power, better cooling hence less fading; smaller discs have lower weight. Fast rolling tyres: Rocket Ron or Racing Ralph are Schwalbe's fast rolling tyres.
Unless you are counting grams, there are no point in running smaller discs, weight is the only positive with smaller discs, but everything else is affected negatively.
If you want a fast rolling tire from maxxis, consider the ardent on the rear. High roller is really not as fast as you might think. Then consider an aggressor for the front. Fast setup, but still great traction.
There is also a bit of crosswind air-resistance to a bigger disc.
Never ever use an Ardent for anything, it's one of the sketchiest tires out there.
New Rekon in normal width does everything the Ardent does, but better, and if you're not a Maxxis fanboy, there are tons of better trail tires out there.
#askgmbntech
Hi guys, what would be the perfect travel for being as efficient as possible climbing and going downhill??
travel does not matter, it's weight, and of course taht's if the suspension is set up properly, if not more travel will result in even more inefficient ride.
there can be bike with less travel that are less efficient, than a bike with more travel.
but if the weight is about the same & suspension is set up properly there should not be much difference, and of course geometry,reach,wheelbase, fit....
with coil sprung suspension too much travel will be a lot heavier.
I like 120-140.
For a full suspension or hardtail? If you have a full just go for those xc full suspension bikes. Maybe from 100 to 120
my comment still stands no matter if it's a hardtail or full suspension bike. and travel depends on the size of the rider, bigger he or she is bigger frame and more travel can be used, go for as much as possible, without too much weight penalty,proper suspension, with all the adjustments needed. I need a full suspension bike to do gnarly stuff, my back & neck can't handle hardtail with this kind of riding.
forks and shocks got lockouts, but I like to keep it in open no matter what.
if you ride xc then xc bike will be more efficient if you ride every thing a trail bike or enduro bike will be.
Johannes nilsen thanks a lot for you answer!!
You have a lot of reason in what your are explaining and i agree with you.
I have a hardtail and i am going to buy a full sus, the trouble is that i dont know if buying the Orbea Occam Tr 120/130 or the Orbea Occam Am 140/150. I do big rides at the pyrenees, with huge climbs (around 1.500 meters climbing) and obviously huge downhills on single traks, and high mountain terrain with lots of technical stuff.
Anyone ridden rhe vitus sommet?
Gavin Sorenson 🙋
@@jimleonardros1126 do you like it? Have you ridden many other bikes?
its a good bike dude depending on which model you go for but theyhave great spec for the money and the geometry is great for most enduro type riding
Gavin Sorenson yeah i've ridden some scott and giant bikes. It was surprising that vitus feels really good when you ride it without even breaking the bank
Mavic Deemax wheels - the go-to standard in world cup downhill for many many years - uses straight pull spokes. Yeah, they're strong enough.
Straight pull spokes falling out when under-tensioned is a fault of the hub design. With hubs like those from Hope, it's impossible.
www.hopetech.com/product/pro-4-straight-pull-6-bolt-front-hub/
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