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  1. #1
    Senior Member
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    Jul 2008
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    48cm gitane reynolds 501 road bike; 1992 specialized rockhopper with slicks
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    converting old schwinn with ashtabula BB to a cartridge BB

    is this possible?

  2. #2
    Old fart JohnDThompson's Avatar
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    Nov 2004
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    Not sure about a cartridge BB, but you can convert it to square-taper to allow different crank choices:
    http://www.biketoolsetc.com/index.cg...d=YS-82WDOUBLE

  3. #3
    coprolite fietsbob's Avatar
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    Add a Conversion piece, it's 2 machined rings, that are pulled together with 3 or 4 bolts,
    and the rings are threaded, and there is the shoulder on the rings that holds them in place..

    For installing screw in BBs.. Any Bike shop should have a source for one..

  4. #4
    Senior Member
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    fascinating. thanks!

  5. #5
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by fietsbob View Post
    Add a Conversion piece, it's 2 machined rings, that are pulled together with 3 or 4 bolts,
    and the rings are threaded, and there is the shoulder on the rings that holds them in place..

    For installing screw in BBs.. Any Bike shop should have a source for one..
    Any bike shop in the U.S. should be able to order this:
    http://harriscyclery.net/product/tru...r2171-qc49.htm
    or something similar.
    Jeff Wills

    All my bikes.

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