I use en Spain 205 / 16" contisport contact5 by Continental, and isd very important to aligenment all wheels, the Camber rear i fix it at -1.65 , the problem it has in M3 is the noset wheels , the car is so nosy , and if you change the Camber to -1.5 the nose will be reduce a lot , but its imposible with factory arm, you have to cahnge it, and from other hand the rhis new Camber the car will have les estability against side winds.