Originally Posted by
Iride01
I probably have never kept a bike long enough to come close to wearing out a BB and I certainly don't ride a lot during any year. Lucky to get 3000 miles a year. I imagine many that put serious mileage on a bike do wear out BB's. However this is something that is done after 40,000 to 50,000 miles (64,000 to 80,000 km) On a bike with a decent brand BB if it wears out earlier, then IMO, there are some other mitigating circumstances that probably don't involve riding the bike.
How about 16-25,000 miles? Those were on bikes that were ridden in all kinds of weather (commuting and touring). Both cartridge BBs, both "frozen" into frame, both took a month of penetrating oil soaks to get the old BB out. Lucky for me they wore out two months apart, so I had the first fixed before the second was kaput.
FWIW, I installed the new BBs with plumber's teflon tape instead of grease. Still have my fingers crossed that they'll be easier to get out than those installed with thin layers of greased and then ridden in the rain to wash that grease out.