so i just rotated my 18's and realized that the tires on the right side of the car are bald in the inside, and prety much in the middle.... i have coilovers that i noticed that back right is about 16 threads, and the left side is about 19 threads.. does that affect how my tires wear? or did i just need a 4 wheel alignment????

 

sounds like u need a wheel alignment...

 

If they're bald then there's nothing you can do now for those tires. Get a 4 wheel alignment and new tires and it should solve the problem.

 

definitely you need to have your car re-aligned. it depends how bad the wear is, if it's really bad then you have to change your tires for safety's sake.