I'm pretty new at bicycle repair and maintenance. A couple of months ago I bought an older trek 800 bike that I have been slowly rehabilitating. One component I really don't like is the crank. The existing one is in ok shape with some wear on the teeth. The cassette is in really good shape but ideally I'd like to replace that sometime in the future. One question I had, being budget minded and if I'm going to do this over time, was if I replace the crank, is it also advisable to replace the chain and the cassette? Can I just replace the crank? What's the best approach if I want to phase in this part of the bike mechanics?
I would love to hear your thoughts! Thanks so much!