Cheap chainset? A mate of mine had a cheap SS bike with a one piece crank and pressed steel chainring. Upon accelerating the pedalling action warped the chainring so much it derailed itself. Also the BB was a little loose which made the problem worse.
Cheap chainset? A mate of mine had a cheap SS bike with a one piece crank and pressed steel chainring. Upon accelerating the pedalling action warped the chainring so much it derailed itself. Also the BB was a little loose which made the problem worse.