Originally Posted by TreeSemdyZee

Trip, I believe you have it backwards. Too much air causes the inside to wear more. When having too much air, rather than having a "flat" surface to ride on, there is more of a rounded shape and the tire will ride on the highest point. i.e. inside (center) of tire.

OP. Just to make sure we're all talking about the same thing. When you say "inside" do you mean the middle of the tire or inside as in closest to the car? Since you said "outsides", I'm assuming that by "inside" you mean the middle of the tire.