15x10 with 6.5" BS is the common size. If the car is mini-tubbed with a stock width rear you can go 15x10 with 7.5" BS and have the tire tuck inside the fender lip perfectly. Could possibly fit a 15x12 with 7.5 or 8.5" BS also with mini-tub and stock width. Then again when its mini-tubbed, you should have the rear end narrowed before buying wheels so you can go deep dish with like 4.5" BS. They look better.