Hi, I have a 2004/ 2.2 roadster. I have recent bought a set of M wheels, 18". 8J on the front, 9J on the rear. The tyres were M sizes and knackered, so I have had fitted new Falcon 452's. Front 18/225/40, rear 18/255/35, as per the sticker in the door well.
I have test fitted the wheels to the car (needed new centre caps, new caps on e-bay - rubbish, kept pinging out!!) the rear protrude beyond the wheelarch about 14 -3/8 of an inch. Have talked to my trusted MOT garage, he said it would be OK, but wanted to confirm when tyres on car. His only thoughts were would the body hit the tyres, if bouncing. As the car was (old wheels on) he tested the suspension and said it was so stiff he does not think that will be a problem.
Should we get some good weather I'll fit them and see what he says, will also put some picture on as well.