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  1. #1
    mtbr member
    Join Date
    Aug 2008

    Bearing ?? 45-degree and 36-degree contact

    For a 36x45 bearing Which is the angle of the internal shoulder "cup" for cartridge bearing and which is for the crown race. My Look fork spec is 45-degree for the built in crown. Do I really need a 45x45; or will the stock 36x45 work?

  2. #2
    mtbr member
    Join Date
    Aug 2008
    Thanks, I will just buy a bottom 45x45 bearing (that is Campy standard I think). FSA makes an "Orbit" 45x45 bearing; that should fit.
    FSA Orbit CF 45x45 degree 1-1/8" Headset Bearing Yellow Seal

    The first number (36) refers to the bearing to fork/centering ring interface. The second number (45) refers to the bearing to frame, or headset cup interface. If the fork specifies a 45 degree inside angle on the bearing, get one. Attempting to use the 36 degree bearing will ruin the fork. Don't attempt to change the top bearing to 45/45 and keep the original (36) centering ring. You could buy a complete headset, or just the bottom bearing, and keep the top as is.

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