20000km is a joke, I've put that distance on a bike without even replacing the chain (although I should have). I have new bikes and old, my average frame age is

20000km is a joke, I've put that distance on a bike without even replacing the chain (although I should have). I have new bikes and old, my average frame age is probably 40 years old, and I seek out old steel frames with particular tube sets and construction methods because they're often just as good as today's steel frames.