I think you used wrong size of tires that's why the gap is big. The correct size should be 275/35/19. Some speed shops or tire store will recommend you to get 275/30/19 cuz they don't want to you go back to them if your wheels rob your fenders after you lowered your car, and some shop recommend this size is just simply because they don't have 275/35/19 size in stock, and since they want to finish the deals so they just slap on whatever they have.