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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 12-16-07, 10:10 PM   #1
Az B
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Old and new crank/BB compatibility

I'm just curious and rather than disassemble two perfectly good bikes to try it, I though I'd ask the braintrust.

I have an old Japanese bike (early 80s) with a rather bizarre crank. I have a spare 2007 Ultegra crank (with the outboards bearings) that I would consider installing. Has anyone tried this?

TIA!

Az
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Old 12-17-07, 12:02 AM   #2
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Is the bottom bracket shell bizarre too? If not, it will work.
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Old 12-17-07, 07:15 AM   #3
Az B
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The crank is a problem because the BCD is something odd like 84, and it's getting hard finding replacement rings. A new Ultegra crank would be far easier to find rings for. And probably lighter.

Thanks for the info, now all I gotta do is get a 25 year old crank off!

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