can a knackered BB make cranks feel like they have a wobble?
I would normally go with the pedals with this description (as with other comments above), especially if you can’t recreate unless you are pedaling. If you are using SPDs or similar, maybe a worn cleat? Also, unlikely but worth a check – make sure chainring bolts are nice and tight.Posted 4 years ago
Stuck at work and it could be a couple of days before I can swap the BB and see for myself. I know the non drive side was fitted with the spacer off set for a while 😳 , so not doing its job evenly around the cup, the non-drive side feels like it wobbles just after its passed 12 o’clock, only slight, and I can’t recreate unless peddling. GXP BB too, so blaming BB seems a place to start. Am I kidding myself?
Would prefer not to be buying new cranks just yet, as the bike has a question mark over its future. Your pearls of wisdom or scorning criticisms over slapdash BB fitting are awaited…Posted 4 years agocraig5Subscriber
What cranks are you using? Had the same issue 2 week ago. I thought it was my pedals, I knew the bearings were shot. After 100m it was getting worse & on closer inspection found out my crank had come lose very very slightly on the drive side axle. Race face cranks attach to the axle on the drive side and the movement has mashed ( only slightly) the splines inside the drive side of the crank. Now my crank is a write off, as no amount of tightening will stop the wobble and it will only get worse with every pedal stroke. I’m guttedPosted 4 years agoandrewhMember
1. Check all bolts are tight and pedals screwed in firmly.Posted 4 years ago
2. Grasp both cranks firmly and try to wiggle them. If they move togther in a uniform manner it’s the BB. If one moves it’s the crank. If neither moves check the pedals. Note loose BB feels very similar to knackered BB.
From your description (one crank and only when peddaling) I suspect BB/crank interface.
See you’re just trying to get my hopes up. I may one last fiddle, but its not the BB, I’ve swapped it out for a spare. Even found myself checking the frame in case BB shall cracked, cos that would be better ❓ – I’ve more or less decided to replace the summer season with a BFe no anyway, so wouldn’t mind getting some cranks as part of that operation really.Posted 4 years ago
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