Yes if they are ET50 you will need 8mm on the rear. I am running h&r springs 18x8 on 225/40/18 Michelin PS2 & have bad rubbing. Ok if it's just me but add 1/2 people and it rubs bad. Especially since it got a bit faster! It actually rubs under accerleration!! I am going to remove the screw in the rear arch to see if it helps of not will get some 8mm. The front is fine! What Nath means is the PS2 is a wide tyre. I won't go 215/40/18 though.