Every application is different, in my case I have an 03 impreza with 18in wheel. I had a 3in gap in the wheel well. I installed h&r lowering kit with 2in drop In the rear and about 500lbs in the rear it gave me three in lower. Theres about 2 cm between tire and wheel well but bucause of the spring rate it never tonches! Even with 3 passengers I'm safe.