Hollow bottom bracket bearing ordering

Discussion in 'Bicycle Mechanics and Repairs' started by skudupnorth, 4 Mar 2018.

  1. 11764B9D-30F2-472A-AB49-F16BC3E78271.jpeg Need some help on how I size these new fangled bottom bracket bearings for my Boardman SC Comp fixie.
    Checked on the usual online suppliers and no numbers match what I have on the original unit.
    This has lasted 7 years and has finally given up !
    So, how do I size this lump ?
     
  2. Cycleops

    Cycleops Veteran

    Location:
    Accra, Ghana
    That has BSA (British thread) marked on it so that’s your answer. You buy the entire unit as shown. Don’t over tighten.
     
    Last edited: 4 Mar 2018
    skudupnorth likes this.
  3. OP
    OP
    skudupnorth

    skudupnorth Guru

    Location:
    Astley,Manchester
    So all bearing diameter sizes are the same, just go off the British thread ? Thanks for that, it’s the first time I have had to order one :okay:
     
    Cycleops likes this.
  4. Cycleops

    Cycleops Veteran

    Location:
    Accra, Ghana
    The actual bearing sits inside the adapter and it’s this that has to have the correct thread.
     
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  5. cyberknight

    cyberknight Legendary Member

    Location:
    South Derbyshire
  6. OP
    OP
    skudupnorth

    skudupnorth Guru

    Location:
    Astley,Manchester
    I’ll measure the length. Many thanks for your advice chaps, damn this modern stuff :laugh:
    It’s as bad as modern cars which I why I drive a 23 year old car with no gizmos
     
  7. iluvmybike

    iluvmybike Well-Known Member

    Its a SRAM GXP bottom bracket cups - you will need to get the same type to fit your cranks
     
    skudupnorth likes this.
  8. Ajax Bay

    Ajax Bay Veteran

    Location:
    East Devon
    GXP differs from the likes of Hollowtech 2 as the spindle is stepped - 24mm dia drive side and 22mm dia non-drive - SRAM-Truvativ.
    Would be very surprised if not 68mm.
     
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