Hz, don't use the gap between the top of the tyre and wheel arch to gauge your ride height. The front wheel arch needs to be 'taller' than the rear to allow your front wheels to turn outwards without fouling the fender. Rather view the car from the side at a distance. Ultimately you should have a rake of around 15deg's ie the sill of the car should not be level with the ground but should be slightly higher at the rear than the front. Cheers