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Frame/wheel flex and disc brake problem
Hi all,
This is the first time I post here, I'm Christophe 27 year old, riding a 03 Specialized FSR disc in the french alps. I post this e-mail cos I'm experiencing exactly the same trouble as yours with exactly the same bike and component setup. My dealer already exchanged the frame and wheel, and got the deore disc brake checked by shimano (no issue there). I can reproduce the issue on my wife's FSR also, with my wheel and brake mounted on it. I currently do no what to do anymore, because this looks like a "built-in feature" of the stumpjumper FSR to have that kind of flex. Did you manage to fix this by changing a skewer or getting a better hub than the deore disc? Question for all, do you experience on your own full suspension bike any lateral movement of the disc when seated on the bike? Thank! Christophe Message 1 in thread From: Caspar Lugtmeier & Eva Skotarczak ) Subject: Frame/wheel flex and disc brake problem View this article only Newsgroups: alt.mountain-bike Date: 2003-11-10 03:04:05 PST Hello, I have some problems with my rear disc brake: When the rear is not weighted, the wheel+rotor spins freely and the distance between pads and rotor is evenly ditributed. However, when I sit on my bike it touches the inside pad (note that I weigh 68 kg....). At first it was driving me crazy (re-adjusting the caliper+pads numerous times), but now I have identified the problem, and am very close to finding the cause: 1) frame flex (Specialized Stumpjumper FSR comp 2003) 2) wheel flex (Shimano deore disc+Mavic X221 rims, not so good anyway, looking for upgrade with DT swiss component wheels) 3) skewer flex? (Shimano deore, already ordered XTR skewers) Note that the distance the rotor moves (when you put weight on the bike) is very small (+/- 0.2 mm) but deadly when using discs. I hope the cause can be found in 2) and 3) (will try with some other wheels at the LBS) but I am afraid that it might be cause nr 1) When the rear wheel is weighted it should bend in a way that the rotor touches the outer pad (if that was the cause) right? Anyway, have some of you experienced similar problems? Thanks, Caspar (PS: now I have the pads adjusted so that they are free when I sit on the bike.... and drag when you just spin the wheel) |
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Thread | Thread Starter | Forum | Replies | Last Post |
Frame/wheel flex and disc brake problem | Caspar Lugtmeier & Eva Skotarczak | Mountain Biking | 5 | November 12th 03 09:36 AM |