Originally Posted by
bampilot06
The guy I went to go riding with today never showed up. I got a text message later on in my ride that his crank arm fell off. I went and found him, sure enough his crank arm fell off while. The bolt that holds his arm on looked ok, I’m not really sure what happened. He had praxis oval cranks.
Little bolt or biggin'? Little bolts usually just pinch the crankarm on to the spindle, essentially the same as stem to a steerer. Big bolts usually thread in to the spindle. Either way, being under-tightened was likely the problem.