I have a Trek 5200 that's little less than a year old. I wipe down the chain and/or clean with a relube every week. The bike has a 10-speed cassette so I realize that the chain will wear a bit more quickly than my previous bikes. Here's a brief history:
- At 1000 miles, chain replaced by LBS -- cassette/chainrings, OK
- At 2000 miles, chain replaced by LBS, cassette worn and replaced as well, however my 52/39 chainrings are worn and need to be replaced as well.
Does this sound quick to anyone else regarding chainring wear/replacement?
I'm not at all surprised by the chain at 1000 miles and 2000 miles from the cassette isn't too bad I suppose -- but I'm really wondering why the chainrings went so quickly. On my previous two road bikes, I never had a chainring replacement.
The LBS is kind of at a loss as well -- their best guess is that the 5200 shipped with Bontrager chainrings/crank (all the other components are Ultegra) and they're now a little suspicious of the Bontrager chainrings.