swee'pea99
Legendary Member
(Back off Fnaar...)
Just built up my new fixie and the right crank's fine, but the left one won't stay tight. I've tightened it up really tight...as tight as I dare go for fear of stripping threads...and it feels ok until you're out on the road and try a bit of reverse-braking, then you can feel it 'give', just a bit, but definitely.
Now, this happened on the crank I'd transferred over from my old fixie, where it was fine - snug as a bug. And I was well baffled, not least because the BB is brand new - a Shimano, fresh from the box. And they don't make duff gear. So I tried another crank. Same story. And another. Same story.
Two of the cranks are Shimanos one's a Sram, they're all in good nick - used, but neither old nor battered - and like I say, the first one I tried had been running fine for years on a different bike (also fitted with a Shimano BB).
Am I missing something obvious? Any suggestions much appreciated.
Just built up my new fixie and the right crank's fine, but the left one won't stay tight. I've tightened it up really tight...as tight as I dare go for fear of stripping threads...and it feels ok until you're out on the road and try a bit of reverse-braking, then you can feel it 'give', just a bit, but definitely.
Now, this happened on the crank I'd transferred over from my old fixie, where it was fine - snug as a bug. And I was well baffled, not least because the BB is brand new - a Shimano, fresh from the box. And they don't make duff gear. So I tried another crank. Same story. And another. Same story.
Two of the cranks are Shimanos one's a Sram, they're all in good nick - used, but neither old nor battered - and like I say, the first one I tried had been running fine for years on a different bike (also fitted with a Shimano BB).
Am I missing something obvious? Any suggestions much appreciated.