Rim brake alignment
07-25-22, 05:34 AM
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Rim brake alignment
Hello folks, can anyone there know why my brake caliper on the rear (Shimano Claris R2000) is keeping on dis-align even though the mounting bolt is tight enough, result on touching the brake pads on side on rim. I always noticed it after few kilometers let say 15-20k. I hope anyone there know how to fix.
07-25-22, 06:07 AM
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07-25-22, 09:03 AM
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Hello folks, can anyone there know why my brake caliper on the rear (Shimano Claris R2000) is keeping on dis-align even though the mounting bolt is tight enough, result on touching the brake pads on side on rim. I always noticed it after few kilometers let say 15-20k. I hope anyone there know how to fix.
07-25-22, 09:16 AM
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If the brake housing for your rear brake is too long it will try to push the caliper to the side.
Can you post a pic from the side of of your bike showing how the cable housing is routed? It would help.
Can you post a pic from the side of of your bike showing how the cable housing is routed? It would help.
07-25-22, 10:43 AM
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Two questions: is your brake housing too short so it tends to pull the whole caliper askew? If no to that, does the brake always skew the smae, not very big amount to the same side? (If both brakes do it, to opposite sides to the bike, ie the same side relative to the caliper.)
Dual pivot brakes are by design asymmetrical. This means the two arms have different leverages and different rates of swing. If you set the pads equidistant from the rims so they look "right", one pad will hit first and with further squeeze, the caliper then pushes the rim to one side. If the caliper has any tendency to "center" from braking force, now these "centered" pads will pull back unequal distances from the rim.
Welcome to the seedy underworld of dual pivot brakes, the unspoken stuff you aren't supposed to notice. (I always set my dual pivots askew so a firm squeeze does not push the rim. Probably bugs others but that is the curse of knowing,
Dual pivot brakes are by design asymmetrical. This means the two arms have different leverages and different rates of swing. If you set the pads equidistant from the rims so they look "right", one pad will hit first and with further squeeze, the caliper then pushes the rim to one side. If the caliper has any tendency to "center" from braking force, now these "centered" pads will pull back unequal distances from the rim.
Welcome to the seedy underworld of dual pivot brakes, the unspoken stuff you aren't supposed to notice. (I always set my dual pivots askew so a firm squeeze does not push the rim. Probably bugs others but that is the curse of knowing,
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07-25-22, 11:50 AM
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Merged duplicate threads.
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