BB sizing?
01-20-14, 05:10 PM
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BB sizing?
So I took the bb off my 2012 Trek Wahoo. The label on the bb says 73x 122.5. I need to get a new power spline bb for it. Will I need to get a different size for the power spline?
01-20-14, 05:20 PM
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If I'm right, the 73mm stays the same (part of the frame) and you have to get a BB made for that. But the spindle length may change according to the crankset's offset. Usually crank specs mention recommended spindle length someplace.
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“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
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01-20-14, 07:59 PM
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Power Spline... Are the arms' spindle holes still in good condition? I have to admit that the PS cranks I've had to deal with have been a disappointment in sourcing parts. Most have had rounded out crank arm/spindle holes. It's a shame that an orphan has survived in the market place for so long. Andy.
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