On 2/6/19 7:20 PM, Mark J. wrote:

snip

I've seen a lot of these things, mostly through negligence or
envelope-pushing.

On my neglected commuter bikes (clean 'em once a year, ride in routine
rain, short urban start-stop commute, replace every 20 years or so) I've
had one (rear!) rim fail at the brake track while riding, and replaced
at least 3-4 other seriously worn ones 'cause I didn't want to repeat
the experience.

On my "road" bikes, esp. the one that never saw damp pavement, the rims
hardly show wear at all.Â* Long rides in the country with few or no stop
signs will do that; brakes are rarely used on those bikes, maybe 10
times in 30 miles.

I'm continually amazed at how my 'dry miles' only bike lasts. Over
3,000 miles on a chain, and it must be good for another 1,000.
Unthinkable on my all year round commuter.