Not a stupid question at all if get a compass and measure from the centre of the wheel out to the centre of the bolt holes thats the radius double it and thats pcd pitch circle diameter
Cheers lads thanks for that ,now I gotta get ordering my new wheels. Was gonna order from Urban per4mance the 18" Ultralite spec alloys in Gold. Waiting for them to get back to me. Do they do tires aswell? And what sort would ye recommend? Have Eagle F1s on the car now and they seem to be ok and used Nankang aswell a very good tire. Has anyone used toyo proxs.