Join Date: Jun 2010
Location: NW,Oregon Coast
Mentioned: 27 Post(s)
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Strip the frame and start over, as said above.
Unscrew the external bearings,
they were machined to screw into BB's as they were made, right is LH thread.
you Will need special tool to grip the external bearing cup,
to unscrew them, so if there is no desire to buy that tool, to use once,
get the bike shop to use theirs.
the frame threading is unchanged, so you then install a square taper BB .
package the external bearings with the crankset they came with.
only a BB 30 set is needing a unique frame.
Last edited by fietsbob; 05-25-11 at 09:49 AM.