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Which is the correct BB for my frame?

SlimtimSlimtim Posts: 1,042
edited May 2008 in MTB workshop & tech
I am building up a Klein Palomino and it is becoming a labour of love!

The next task is to find the correct bottom bracket. The BB shell is 73mm (I tried fitting a 68mm BB this morning and it is clearly too short) and I want to fit Shimano Hollowtech 1 XT cranks - the model is FC M751.

Can anyone tell me if these cranks are Octalink or ISIS compatible and what length spindle I will need?

Thank you in advance for any help.


  • nicklousenicklouse Posts: 50,675 Lives Here

    what is your current set up?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • SlimtimSlimtim Posts: 1,042

    I bought the frame without any components so I am making it up as I go along - as a result, I don't have a 'correct' BB to use as a guide for length.

    I would estimate it from the clearance or lack of it that comes from using the 68mm BB that I have already. I think I need to choose between 113 and 118mm spindle length.

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