• 110bcd, 52x 36 standard rings.

    Just casually checked the frame I'm buying and it's a PF91 BB, which looking at options would take a BB30 or GXP crank depending on which BB I fit? Or have I made a fopar?

  • Or have I made a fopar?

    Definite faux pas. PF91 shells are 91mm wide, BB30 cranks are made for 68mm wide shells. It's possible that somebody might make some thin bearings to allow a 30mm axle to go into a PF91 shell, but it would need to be an abnormally long axle, the other lengths are 83mm for some MTB cranks and 86mm for BB386EVO road cranks.

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