Man you have a 4 wheel alignment prob. Have you been getting 4 wheel alignments or 2 wheel. Camber will cause uneven wear similiar to tire pressure wear probs. Not too many places offer 2 wheel but I'd def go get one. Pot holes WILL cause that-- I kow b/c my parents live in OP and I live in Pittsburg (1/2 the streets are brick). I have taken my car and my fiance's Neon (both lowered) to a Burnett's Auto on 135th and Quivira. They are honest and I know they use a Hunter machine to align cars. They also give a printout before and after. It's about $65 to get it done.
