Cottered Crank Conversion

[wheelhorseman]

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]

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]

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]

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]

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...

 

[RustySprockets]

sheesh...just spend three bucks on this and take your own measurement.

http://www.harborfreight.com/6-inch-utility-caliper-7914.html