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Changing BB and Cranksets

  • 19-10-2010 4:56pm
    #1
    bmacg
    Registered Users Posts: 21 ✭


    I'm a bit new to all of this so I crave your indulgence.
    I have three bikes; an old road bike with the old cottered cranks, with cup and cone BB; a Trek 1000 with an internal sealed cartridge BB, and a Corratec Forcia CA+ with a Shimano 105 external BB and two-piece crankset. My idea was to buy an upgraded crankset and BB for the Corratec, then move everything 'down' one; so I'd fit the 105 BB and crankset to the Trek, and fit the Trek BB and crankset to the old racer, dumping the cottered cranks and BB.
    How do I know if each is compatiable with the other? What sizes and specs should I be looking for, so I don't waste money on something that won't fit my bike?
    Any help or info greatly appreciated.


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