View Full Version : How to tell if chain ring is too worn?

01-17-2012, 09:10 AM
I am looking to upgrade the cranks and chainring (and bottom bracket while I'm at it) on my cheap steel-framed fixed-gear bike. I can't afford a nice new chainring, so if I am buying used, how can I tell if the chain ring has too much wear? What am I looking for? Any guidance on this is much appreciated.

01-17-2012, 10:10 AM
They start to look like shark fins...they pretty much lose their symmetric points.


01-17-2012, 10:56 AM
Hang a chain over the chainring. Tug on the chain at the top.

If it won't come up much the chainring is good. If it comes up a little, not so much but it will probably work fine for a single cog rear if the tension is right.

If it comes up a lot the chainring is shot.