Do you think chains should be changed regularly as a precaution before they stretch too much and start wearing out the rear cogs or should you just keep riding the chain until both the casette and the chain needs changing together.
I took my bike to the LBS to service the hubs recently and asked them to change the chain since I have just over 2k miles on it. There seems to be no noticeable wear on the cassette and the chain isn't obviously stretched but I did notice the chain skipped a couple of times when on the smaller cogs at the back. The shop said he wouldn't replace the chain without changing the cassette, but my cassette is fine (no sharp teeth all square still). He said I should just keep riding with the same chain until the cassette also needs changing. But if I change the chain wouldn't I keep the cassette in good shape for longer?
Thanks for your thoughts