If you are using stock wheels and suspension you will find most members here use a 225/40/18 F and 255/35/18 R. This setup gives you a little wider tire and no rubbing issues. The set up you stated will make the rear tire about .6 in taller in the rear. Here is a link to 225/255 setup posted by Dack.
http://www.1addicts.com/forums/showthread.php?t=510873