My chain keeps dropping off the chainrings under load. It's most noticeable when starting off from a standstill when the chain is on the middle ring. The chain drops to the small ring and sometimes completely off the crank.
I've never had this happen before. It seems really strange. Makes me look like an idiot too when I almost fall of my bike with legs spinning like mad . What is the most likely cause?
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Thread: dropping chain (strange)