You are reading a single comment by @M_V and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@M_V
I presume it was the left hand crank arm that came loose? (Although I see you've said you fitted them loosely so maybe not)
Forces going through the non-drive side crank arm/bb taper are a lot higher/less supported (rh side is supported by the drivetrain) so it tends to be left hand cranks that work loose.
Riding a mile or two on a loose crank arm is probably enough to knacker the taper.
If the crank arm is buggered though, it won't take anything else with it so ride it to destruction.