Which new BB and cranks?- Mtbr.com
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  1. #1
    mtbr member
    Join Date
    Jan 2017

    Which new BB and cranks?

    Iím riding a 2017 Kona Unit I got back in March and I love it. Couldnít get just a frame at the time so I got a complete and have done some upgrades:

    SLX brakes
    KS LEV
    Raceface Carbon handlebar
    Saint pedals
    ARC40 rims
    DT Swiss 240s hubs (36t)
    Nobby Nic 2.8Ē x 27.5
    18t and 20t wolftooth rear cogs

    The bottom bracket got noisy a couple months ago and the drive side crank loosened. I took it to my lbs who relubed it and tightened it and it was smooth for awhile but now it is noisy again and loosened up once more. Only on the drive side, and the preload cap? (on the drive side also) fell off on a ride.

    I tightened up the drive side with a 10mm hex and it has stayed tight for a few rides but is making noise/not smooth when Iím cranking hard on steeper sections.

    Seems like time for replacement? I want to upgrade the FSA Comet cranks anyway and want a smooth, solid and reliable bottom bracket. (And reassurance Iím picking something compatible). Current cranks are 175mm, will probably keep that the same and stay alloy over carbon but try to lighten up some.

    It has a FSA 7100 bottom bracket,


  2. #2
    mtbr member
    Join Date
    Oct 2013
    I would use Race Face cranks with a Shimano XTR BB. My opinion. It's what I use. The Race Face BBs are crap, but the 30 or 40 bucks for a XTR makes a world of difference.

  3. #3
    Always in the wrong gear
    Reputation: Impetus's Avatar
    Join Date
    Aug 2014
    XT bottom bracket and RaceFace direct mount cinch cranks.
    Donít modify the trail to match your skills, modify your skills to match the trails.

  4. #4
    Downcountry AF
    Reputation: *OneSpeed*'s Avatar
    Join Date
    Oct 2013
    Wheels Manufacturing Angular contact BB, RF Turbine Cinch cranks.
    Rigid SS 29er
    SS 29+
    Fat Lefty
    SS cyclocross
    Full Sus 29er (Yuck)

    Stop asking how much it weighs and just go ride it.

  5. #5
    mtbr member
    Join Date
    Oct 2009
    I am a fan of Shimano XTR cranks they have served me well over many thousands of single speed miles.

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