Bottom Bracket for Rotor 2inPower MTB- Mtbr.com
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  1. #1
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    Bottom Bracket for Rotor 2inPower MTB

    Hi,

    I'm currently riding a Scott Scale 700 RC World Cup from 2017 using the following bottom bracket: Sram GXP PF integrated / shell 41x92mm.

    There's a lot of creaks coming from the bottom bracket and having read online how bad the GXP system is, it is time to go all-in.

    I'm therefore considering getting a Rotor 2INPOWER DM MTB Power meter but unsure about the bottom bracket to go with it.

    Will a BB92 30mm bottom bracket fit? If yes, any recommendations?

  2. #2
    mtbr member
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    GXP is a spindle spec. It works fine and there's nothing wrong with it. The problem in your case is the PF BB, which is a frame shell spec and can be problematic wrt creaking and longevity.

    So, you'll need a BB that fits a 30mm spindle and your PF frame shell. This is a marginal situation as there's not enough room in the PF shell to fit reasonably sized bearings between the shell and a 30mm spindle. The balls will have to be small. Some manufacturers offer dual row bearings for this application as a means of mitigating this issue.

    I'm running a RF Cinch PF x 30mm BB pn BB19BB899230DR. This is a relatively inexpensive dual row BB. It's been working well for me so far. There are other more expensive options. Check Wheels Manufacturing and BB Infinite.

    https://www.bbinfinite.com/pages/mountain-30mm-spindles
    What, me worry?

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