Originally Posted by
SpedFast
I'd start by measuring the chain for wear and then making sure the upper and lower stops are set on the frnt DR. If that all checks out take a really close look at the chainring. Does it jump both or just the large? There's a reason it's not always working properly. Your mission, if you decide to tackle it, is to find out why. Good luck, Nice bike BTW
No front mech, it’s a 1X
if it was still playing up I was also thinking chain stretch or maybe worn chainring and new chain where the chain was rising up the teeth (or misplaced N-W but he covered that) but the fact it fixed itself is just very odd.
edit: and the other thought I had was maybe an untightened quick link but this was after a ride where it was fine so can’t be