Cupping on interior shoulders of rear tires

[ochy38]

Originally Posted by TOUGEghost

Rotation as in removing the wheels and tires and rotating them to a different position on the vehicle. This is done to prevent uneven tread wear and prolong the life of the tires.

I just looked into the rotation issue some more. Definately thinking thats the problem, its been at least 1.5 years since she rotated the tires. I've been a amateur-ly working on cars for the last 5-6 years and never heard about that one. I just assumed rotating allowed all four tires to wear evenly in relation to each other. Thanks for the info.