i have bought a set of 17" rims for my sapphire 1,8 lx today they are ET38 with 215/40/17 tyres they fit the rear arches nice and sit in well only thing is they catch the back box pipe on the bend before it meet the rear box also the front suspension cups are really close to the tyre there is about a 1 cm gap between the strut cup and tyre is this normall and would it be better if i ran 205/40/17 tyres on the front ?????????