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2013 SRAM Red aero link brake rub

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2013 SRAM Red aero link brake rub

Old 10-02-12, 08:49 PM
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ruindd
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2013 SRAM Red aero link brake rub

I've always run shimano brakes but 'took the leap' and have some new red brakes on my bike. It seems like they're very prone to moving off center and rubbing under hard pedaling. I've gone back and tidied up my housing (mostly shortened it to prevent the housing from pushing the caliper to the side) but I'm still getting some rub. It seems like the calipers drift off center over time.

Is this always the case with single pivot brakes? Any tips or hints?
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Old 10-02-12, 09:26 PM
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I haven't seen those brakes, but as a long time user of single pivot brakes suggest you put a dab of grease (or oil) on the spots where springs engage the arms. As brakes open and close, the spring slides a bit there, and friction can throw off the balance.

IME, this is the single most common cause of brakes that seem to move side to side without cause. The failure to properly diagnose the problem by so many shop mechanics is what gave single pivot brakes a bad reputation.
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Old 10-02-12, 09:30 PM
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I thought that the Reds are double pivots. Double pivots will cause more friction if they are off center and rubbing. This is one of the advantages of traditional single pivots. They have only the spring pressure to make the pad rub the rim if off center.

Are the brakes off center after your ride? Or do you only feel the rubing during but the pads still clear the rim when stopped? Many of the reduced spoke wheels are very flexible sideways under hard and uneven pedalling pressures. Andy.
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Old 10-02-12, 09:33 PM
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To add to FB's advice. Make sure the caliper spring is free of rust and grime where it hits the caliper arm tab. Steel wool does a good cleaning job if rubbed along the spring. Andy.
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Old 10-03-12, 12:20 AM
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According to SRAM, the new 2013 Red calipers are cam-actuated single pivot brakes. The cam increases the braking power without needing more cable pull.

I haven't seen the 2013 Red calipers as well or worked on a cam-actuated brake either, but I suggest in addition to FB's advice on the spring, try oiling the cam too as it might be getting stuck there.
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