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04-06-12, 05:12 PM
Hello all,
At the end of last year I purchased a Cannondale Trail SL 29'er 3
http://www.cannondale.com/2012/bikes/mountain/hardtail-29er/trail-sl-29er/2012-trail-sl-29er-3-20751
I noticed at the beginning of the year that my front rotor was rubbing on the brakes once a rotation. I figured this was a bent rotor and just bought a new one.
I just installed the new one, reseated the brake pads and centered the brake caliper (unscrew calipers, hold brake, re-tighted) and... I still get rubbing once a rotation!
Watching the new rotor spin around, it is definitely moving outwards in the same spot once a rotation hitting the outside brake pad. But this is a brand new rotor!
Could the surface on the hub where the rotor mounts to be bent / uneven? I made sure to clean it off before installing the new rotor, made sure I tightened the torx screws in the correct order and to the specified in-lbs... That is the only thing I can think of which would cause both old and new rotors to hit the brake pad once a rotation...
(If the wheel wasn't seated correctly in the drop outs then the rotor would hit the pads all the way around, and I've reseated the wheel several times anyways!)
What should I do?
At the end of last year I purchased a Cannondale Trail SL 29'er 3
http://www.cannondale.com/2012/bikes/mountain/hardtail-29er/trail-sl-29er/2012-trail-sl-29er-3-20751
I noticed at the beginning of the year that my front rotor was rubbing on the brakes once a rotation. I figured this was a bent rotor and just bought a new one.
I just installed the new one, reseated the brake pads and centered the brake caliper (unscrew calipers, hold brake, re-tighted) and... I still get rubbing once a rotation!
Watching the new rotor spin around, it is definitely moving outwards in the same spot once a rotation hitting the outside brake pad. But this is a brand new rotor!
Could the surface on the hub where the rotor mounts to be bent / uneven? I made sure to clean it off before installing the new rotor, made sure I tightened the torx screws in the correct order and to the specified in-lbs... That is the only thing I can think of which would cause both old and new rotors to hit the brake pad once a rotation...
(If the wheel wasn't seated correctly in the drop outs then the rotor would hit the pads all the way around, and I've reseated the wheel several times anyways!)
What should I do?