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  1. #1
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    Avid BB7 mounting issue

    Do BB7's require a different IS mount for the rear than the front? I tried mounting a BB7 with the 185mm adapter that came with the brake and the rotor bottoms out in the caliper approx. a 1/4" before the bolt holes line up? I've never run into this before. is there a special 185mm adapter for the caliper to be mounted as a rear brake?

    thanks in advance
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  2. #2
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
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    Quote Originally Posted by NRSguy View Post
    Do BB7's require a different IS mount for the rear than the front? I tried mounting a BB7 with the 185mm adapter that came with the brake and the rotor bottoms out in the caliper approx. a 1/4" before the bolt holes line up? I've never run into this before. is there a special 185mm adapter for the caliper to be mounted as a rear brake?

    thanks in advance
    All disc brakes use different brackets front and rear (except for a few rear post mount frames). A 160mm front bracket fits a 140mm rear rotor.

    Current production BB7s come with both front and rear brackets (marked with a "F" or "R").
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  3. #3
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    I bought these a few years ago but never opened the boxes.They were complete sets with rotors but had an IS and a post mount(both. 185mm) rather than a front and rear. I guess i' m off to the lbs to track down an adapter. Thanks for the quick reply
    Those who know can not explain, Those who don't can not understand

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  4. #4
    Huckin' trails
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    Maybe try to switch the adaptor in the opposite direction ? When I mounted my BB7, I did not put the adaptor in the right direction, so it didn't fit... I just flip it over and it was ok. (because I had in the wrong way first)

    David
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  5. #5
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    Quote Originally Posted by David C View Post
    Maybe try to switch the adaptor in the opposite direction ? When I mounted my BB7, I did not put the adaptor in the right direction, so it didn't fit... I just flip it over and it was ok. (because I had in the wrong way first)

    David
    wasnt the issue, the brake sets I had didnt include the correct adapter for rear mount just front post and IS adapters.As you can see from the pic the front and read adapters are different.



    I never realized there was a difference because I had always used 160 rears and and either 185 or 203 front rotors on previous bikes.

    Thanks Shiggy for the heads up!
    Those who know can not explain, Those who don't can not understand

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