Happened three times now, just seems to unwind itself and then fall off! Put it on really tight again and then still happens. Is it because the thread will have stripped off? If so, what would be the solution?
Just as I pedal I feel the crank getting loose where it screws into the opposite part - the long barrel part that comes on the drive side part of a BB30 crankset.What part is unwinding itself?
Stripped thread is easy to diagnose. If you can't, I suggest take it to a bike shop.
If it is they require a serious amount of torqueI'm not sure if it's a shimano crankset, more likely a FSA like this. Perhaps the OP could make it clear;
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FSA. 46/36. So clean it up properly and give it some serious effort?I'm not sure if it's a shimano crankset, more likely a FSA like this. Perhaps the OP could make it clear;
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It sounds like you’ve got a stripped thread. Check the bolt first, if that’s okay, you’ve stripped the thread, and, although you could re tap the thread, it’s probably better to get a new crank.Btw, just tried cleaning thread and reapplying. Gave it some - but not too much - and now the bolt gets to a certain point of tightness, then slips to become looser again. Is it now completely knackered?
Could I get a left arm crank only? Would that work, if indeed I have got a stripped thread? I only ask because 46/36 fsa cranks are like hens' teeth!It sounds like you’ve got a stripped thread. Check the bolt first, if that’s okay, you’ve stripped the thread, and, although you could re tap the thread, it’s probably better to get a new crank.