Rear BB7 Upgrade Info- Mtbr.com
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  1. #1
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    Rear BB7 Upgrade Info

    Good evening.

    I have started upgrading an older (+/- 8 Years) Specialized FSR S-Works.

    I scrapped the front SID fork and rim brake for a new FOX setup and BB7 disk. Now, I would like to put Crank Brother (tubeless) wheels on and swap out the rear rim brake for a BB7.

    I weigh in at 200 pounds, what size rear BB7 rotor should I install?

    Thanks.

  2. #2
    Mountain Man Dan
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    For the rear. 160mm. Front, 180mm.
    The bike is nothing more then circles turning circles, It's the human motor that makes it elegant.

  3. #3
    Never trust a fart
    Reputation: frdfandc's Avatar
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    160mm rear.

  4. #4
    ~Disc~Golf~
    Reputation: highdelll's Avatar
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    Quote Originally Posted by ProjectDan35
    For the rear. 160mm. Front, 180mm.
    they don't make a 180mm
    Honestly... ahh I give up

  5. #5
    Mountain Man Dan
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    Quote Originally Posted by highdelll
    they don't make a 180mm
    Crap. 185. Been seeing 180 quite often around here. Stuck in my head.
    The bike is nothing more then circles turning circles, It's the human motor that makes it elegant.

  6. #6
    ~Disc~Golf~
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    FWIW (and this maybe against the grain), I run 185s F&B.

    My thinkin' was that if I ever crashed really good and bent up my F-rotor, I'd have a spare to use and I could probably tweak the bent rotor (now rear) enough to clear the pads, but with diminished power and finish the ride.
    To get the braking modulation tuned so they feel roughly the same, is accomplished with the brakes paired up to some SD7s and I tweak the pull-ratio in combo with a bit of pad space adjustment.

    Works great for me and so far, I haven't had to make the swap!.

    **Disclaimer** I also run bar-ends on risers
    Last edited by highdelll; 11-23-2010 at 09:44 PM.
    Honestly... ahh I give up

  7. #7
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    My bike came with 185 f and b. I've been wanting to run 160 in the rear, but it works well, so the effort and expense has not been warranted.

    Actually, in long, steep and loose conditions, where I use just the rear to prevent the front tire from digging, the 185 rear has been a plus.

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