Originally Posted by
dedhed
You said, "you will want to".
I think it's nuts an 87 YO on dry paved trails is going to wear out a cassette in 3K miles.
I don't think anything is nuts. The amount of things I have seen would probably shock some of you but is quite normal in my day to day bike life. Replacing chain and cassette is pretty common unless the chain is replaced early than sure but the more things wear the more things wear. Don't underestimate someone simply because of age.