Any legitimate concerns with torquing of the rear triangle on a trainer?
There was a thread a few weeks ago on a similar topic. Maybe someone else remembers where to find it? It appears that most major manufacturers warranty their frames for use on trainers. Anyone?
Brad
No, you don’t need to be concerned UNLESS you are going to stand up frequently. The trained bolts clamp around your rear quick release and stress the rear wheel axle, not necessarily the frame. The frame begins experiencing more significant stresses only once you start riding in a manner that, out on the road, would make your bike rock from left to right. An example would he sprinting (standing up). Avoid this sort of stuff on the trainer and you’re good.
This is correct, you shouldn’t have to worry about the carbon frame unless you are really moving it in the trainer by climbing on it regularly.
Hi,
Uh NO
and YES I Do Stand all The Time…
if a frame is that suspect I want to kill it on a trainer, not have it die on me mid corner on a 75km/hr descent
…like my 'mates GURU Chrono(h NO!) did last month…man, 'Like a Grape on a Belt-Sander! No winners on that.
Ride On
T-Cough
Got a brief explanation on what happened to the Crono? How it failed? Feel free to PM me if you like.
Thanks,
Kevin
Two youtube vids convinced me it’s no big deal:
http://www.youtube.com/watch?v=lrjId0-K-Ts
http://www.youtube.com/watch?v=QHO_VjVhaE8
Carbon is cool stuff!
I´d not put a valuable frame on a bike trainer. I know people who have broken several frames on the trainer, mostly it´s the chainstay cracking. The standing up is really the worst thing. I think carbon behaves a bit differently, but aluminium softens up and eventually loses its stiffness.
There’s some similar types of videos on Cervelo’s web-site that shows their carbon frames in a machine being torqued up/down and side to side - much worse than anything a person could dish out.
For every person that tells me not to ride my carbon bike in a trainer I find 10 more that say there’s no way I can come close to breaking it.
I’m w/ TomP… if my fancy-expensive carbon frame can’t handle that, then WTF good is it? Might as well be a piece of foo-foo jewelry then. Hammer that bitch.
That’s a valid (and recurring) question. A couple years ago I went on a crusade to contact a series of bicycle brand product managers and posted their responses and names here on this forum. You can do a search and eventually find it with the right key words here.
The bottom line was it didn’t compromise your warranty.