I've been running Avid BB7's with 160mm rotors. I recently bought a used 185mm roundagon rotor off ebay, which appears to be in great condition. I installed it today. Now when I use the front brake I get a bad vibration. Looking down at the axle it appears that the fork is actually flexing forwards and backwards. The flexing seems to be worse when I am seated as opposed to standing with some weight on the handlebars. I also played around for like an hour with adjusting the brake.
The fork is a Fox Float F29. I checked and the headset is fine, hub and wheel is tight. Rotor is bolted on tight. I tried mounting the brake caliper with and without extra washers, no difference.
I read the numerous posts on this but could not find a clear answer to my main question which is: assuming I can live with the vibration =
WILL IT HARM MY FORK?
ALSo, Is the vibration caused by the mismatched wear in my pads and the used 185mm rotor?
Is it caused by the extra flex of the 185 rotor? It seems to be much flexier than the 160.
Will the vibration get better go away as the pads and rotor bed in together? I have a Shimano 180mm rotor layin around- should I try it?
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