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Thread: BB30 crank drag

  1. #1
    XCdude
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    BB30 crank drag

    I have 3 bikes with BB30, and they all seem to have a lot of bearing drag even when torqued correctly. My el cheapo xt or so cranks spin like they have a motor.

    Would changing to ceramics bearing or modifying stock bearings help.

    are mtb bikes and one is road, all Cannos

  2. #2
    mtbr member
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    Very strange. Every BB30 crank i have owned or used has had the least friction of any BB i have experienced.

    Are your torque settings or calibration correct?

  3. #3
    XCdude
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    Yes it was done at 2 diferent shops

    and one by me. One is going for a winter rebuild so I' need to figure something out.

  4. #4
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    A lot of times the friction you feel is from the viscosity of the grease, or from the seal friction. You could try lower viscosity grease, but normally the resistance you feel with your fingers really isn't a significant energy loss when peddling.

  5. #5
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    Quote Originally Posted by chick0 View Post
    Very strange. Every BB30 crank i have owned or used has had the least friction of any BB i have experienced.

    Are your torque settings or calibration correct?
    Have to agree here.

    We have four bikes with external BB and one with BB30.

    The BB30 are so much better than other external BB that we haven;t even bothered with ceramic bearings.

    It could be one of the bearings not fitted square into the frame?

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