I recently bought 4 replica TTRS rotors,which look as close to OEM ,but why are they 8j instead of 7.5j?.Can anyone shed light on this as i swapped my good Hankooks of my Black Edition RS4's and they went on ok but have had the car veering to the left since.I had the car checked on a 4 wheel alignment and its all ok,plus you have to be carefull when parking as the tyres dont protect the alloy now for kerbing.Wish i invested in OEM now.