My first post on here but not my last.
I was hoping someone could help me with a crank arm problem. My left oval 520 crank arm came right off my bike last night and although I have worked out how to put it back ( with an 8mm +16mm hex) there seems to be something missing as the arm is rubbing on the bottom bracket . Does anybody know if there should be a washer or spacer in the assembly ?
Many thanks in advance.