All My Rear Bearings Get Toasted

[What's_nitro?]

I wonder if it's due to the outer race being dented in or the bearing balls being flattened? Have you ever opened one of the dead bearings to look? If the balls are being flattened maybe some ceramic bearings would help since the ceramic balls do not deform. If it's the outer race then is there some way you could insert a steel ring around the bearing to thicken the outer wall a bit?