Originally Posted by
rufvelo
Issue comes from riding the bike. How many miles have you done? Most hard ridden bikes will need a new chain/cassette in a couple of years - 10K miles.
I should have specified, it's been my only bike since it was new, until this past November. It's taken every mile I've ridden over the past two decades.
How many that is, I have no idea. The Avocet 20 that was on the bike stopped working for quite some time and I'd not bothered to repair it till recently, so a good number of years went unlogged.