Cottered Crank Conversion

wheelhorseman · Feb 20, 2014

Ii think I am going to take the frame to my LBS so they can telll me EXACTLY what I have. All this bb stuff is mind boggleing.

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Bendix · Feb 20, 2014

Bicycle808 said:
those'd be Italian threaded, though.

the spindles themselves aren't uniquely threaded, you can use an 'italian' (70mm) shimano spindle with whatever cups you want as long as they hold eleven 1/4" balls.

while most LBSs are unlikely to have much, if anything in a non-campagnolo 70mm spindle, i'll repeat that there are several on ebay right now. ranging from 109mm-122.5mm one of them is bound to work for the OP if he indeed has a 70mm shell.

Bicycle808 · Feb 20, 2014

Oh... i didn't realize you were talking about the spindles "a la carte". That is a good way to go... buys a few more mm for the OP.

wheelhorseman · Feb 20, 2014

Took my frame to my local lbs this morning. Wanted them to tell me the bb size such as 73 or 70mm whatever. They had no idea what I was talking about so I still dont know. Never heard of English or Italian threads etc. What a joke that place was. Another shop did measure my spokes and said I need 242mm lengths.

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Bendix · Feb 20, 2014

wheelhorseman said:
Took my frame to my local lbs this morning. Wanted them to tell me the bb size such as 73 or 70mm whatever. They had no idea what I was talking about so I still dont know. Never heard of English or Italian threads etc. What a joke that place was. Another shop did measure my spokes and said I need 242mm lengths.

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too bad that thread is locked...

just measure the width of the shell (the part of the frame the bottom bracket cups thread into). that will get you started...