Originally Posted by
nhluhr
Plain and simple, chains don't wear out in 2000miles and neither do cassettes. It sounds like you forgot to lube your chain (with reasonably decent lube) or you ride in dust storms.
I don't think lack of lube explains it, either. I've ridden Dura Ace chains/cassettes without lubing them for over 2,000 miles -- the chain became a little noisier, but no wear issues.
Again, I've got 5,200 tough miles on my 7900 cassette and, by the looks of it, I wouldn't be surprised to get another 5,000 out of it. I don't wipe down my chain after any ride. I lube my chain infrequently, -- generally, if it becomes audible.
Something doesn't compute with a 2,000-mile Dura Ace cassette. (Could it have been a counterfeit? Was it bought online?)