Bottom Brackets

Discussion in 'Bicycle Mechanics and Repairs' started by walker, 18 Dec 2007.

  1. walker

    walker New Member

    Bromley, Kent
    Can someone let me know how I find out what size bottom Bracket I need? I see they all come in different sizes so as not to buy the wrong one I'd need to find the size.
  2. A measurement across the shell will confirm it as a 68mm.
    Remove your cranks and measure the length of the axle from flat to flat (x).

    Your BB is a 68 x (x), like a 68 x 113 for example.

    Thats all you need, its not rocket science.;)
  3. Providing it's not covered in rust, when you get it out the old one will probably have a label on it saying what size it is
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