just bought some new 17" on my beza and they fit fine, then got some hubcentric 20mm spacers today fit them and everything is tight. makes the car look very nice but have noticed a knocking noise now every time the wheels do one rotation what is this ive only put these on the rear.also as you look from the back the left wheel looks as though it is more toed in than the right aswell any help would be apprciated!!!!!!!!!!!!!!! cheers