Front/Rear specific disc brakes?- Mtbr.com
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  1. #1
    mtbr member
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    Jun 2004
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    Front/Rear specific disc brakes?

    I was putting some Promax mechanical disc brakes on my bike last night and never noticed that they both have stickers on the back that read "F 10.5". I looked at my friend's bike today (that also has Promax mechanical discs) and noticed his front says "F 10.5" but his rear says "R 15.25". Does anyone know what these numbers specify? Or if the brakes are truly Front/Rear specific?

  2. #2
    Vaginatarian
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    Oct 2005
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    5,685
    front brake caliper mounts (on the caliper) are 20mm larger than rear, you can use them in the rear but they will be 20mm smaller size (F180 = R160)

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