Square taper BB becoming notchy when cups are tightened up.

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Juicy8

Yeah cartridge BB - I installed it all as backed out as I thought sensible... NDS cup (which has the lip) flush with BB shell but not cranked down on it, NDS wound in enough to be vaguely equal in terms of what's sticking out. I took it for a spin earlier and nothing noticeable when you're riding but I'm sure it will shorten the life of everything. Maybe I'll try backing it out slightly now...?

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Adhiero in reply to @Juicy8

NDS cup (which has the lip) flush with BB shell but not cranked down

You mean drive side right? Sounds like the nds is a tad tight. Try loosening in 1/16 turn increments or smaller.

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Juicy8 in reply to @Adhiero

Thanks, that seems to have helped a lot although not solved the problem entirely - think it needs facing. Cheers :)

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