Those?
Wheel bearings are replaced when they go bad (you can hear the distinctive buzzing, roaring sound at speed, and (normally) more pronouned when turning one direction, and less when turning the other.
When you DO replace them, you have to also replace the axle nut (as we were just discussing)..
Other than that, unless you were COMPLETELY anal about maintenanence (some are.. perhaps me...
) you don't have to stick to a schedule.
I end up replacing mine at 60-70K each time, fwiw.. (yes.. I'm anal..)
Ray
