Originally Posted by
TheRealNicola
Hello there I was lubing my chain when I noticed that on certain points when I rotate the cranks the chain starts slack starts to vibrate(don't know if thats the right word) but it moves up and down rapidly. kinda crazy looking. My question is, is that normal? Stiff chain or something? I'll try to post a vid of it tommorrow.
If you're using a road chainring it may be slightly out of round. Try loosening the chainring bolts and cranking it around a bit, then retightning; this can sometimes reduce the wobble effect.
A
bona fide track ring is usually made to tighter tolerances than most road rings, if a new ring is an option for you.