I have a pretty simple question (for some reason I could find an answer in searching the forums). I just bought a new wheelset and I'm looking at what cassette to get. At first I thought I'd just get the same as my existing wheelset, but I notice that limits my options and I'm wondering if I really need the same. I have a triple crankset (30,42,52?) and current a 12-25 cassette. I was wondering if I'd have any problems going down to a 12-23 cassette? I imagine not, but I thought I'd ask. I will double check the chain length though, because I've noticed some new bikes come with a chain that's too long.
Also, I've heard to replace the chain when getting a new cassette. I'll be switching between this new wheelset and my old one, so what should I do in that case? Would I really have to buy two new cassettes? That doesn't make sense, I'll be using them in different amounts and I'm sure they'll wear differently. Any input?