Originally Posted by
Rolla
Agreed on the FD height, but regarding the chainring teeth, if they aren't worn yet, they might be on their way. A closeup photo would help, but new chains and new teeth always play better together.
It's hard to see if the teeth are worn, since they have multiple odd shapes. I'm guessing that the small chainring gets more wear, since there's high chain pressures when climbing hills.
But one thing that can wear out cassettes and chainrings is keeping a very "stretched", worn out chain for too long. It puts high force on just a few teeth at a time.
My Ultegra chainring has almost 30,000 miles on it, from 2014. It's still good: no shifting problems or unusual chain wear. (And the Di2 system still works perfectly.) It's so hard to tell just by looking.
