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  1. #1
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    140mm Rear Rotor for '04 Formula B4 Pro +?

    I was wondering if you coud use a 140mm rear rotor with the new Formula B4 Pro + (B4SL replacements) if I order a front brake/caliper without an adapter and use it on the rear. Would this work as it does with Martas and some other brakes, or am I out of luck?

    I believe that the front brake uses a standard IS mount and the rear uses post-mount mated to a Hayes adapter like Hayes and Avid brakes use. Is this correct?


    Thanks in advance for any info.
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  2. #2
    Ole
    Ole is offline
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    Quote Originally Posted by AZ-X
    I was wondering if you coud use a 140mm rear rotor with the new Formula B4 Pro + (B4SL replacements) if I order a front brake/caliper without an adapter and use it on the rear. Would this work as it does with Martas and some other brakes, or am I out of luck?
    This is correct you can use the IS caliper to get 140 in the rear, and I've done it for many of my customers. But, you don't have to buy a complete caliper, you only need the empty caliper half, as well as a long mounting screw. Should run you around USD50-60 plus work if you don't do it yourself. Prior to 2004, the B4 brakes all came with 140mm in the rear, and the same caliper front and rear.

    Ole (Formula-importer for Norway)

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