Originally Posted by
pdlamb
Some people would rather wear cassette and chain out. Every time I've let one go past the 12-1/8" point, I end up replacing one or more front cogs as well as cassette. It's cheaper and easier to put on a new chain, usually about every 2,000 miles IME.
I don’t know what you are doing but I can’t recall ever replaced a chainwheel due to chain wear. Even if you went an extra 1/16” of an inch over, you shouldn’t have to replace chainring. I’d agree that you might end up having to replace the cassette but not the chainring.
I get 3000 to 3500 miles per chain and 3 to 4 chains to each cassette.