When my Goodyears wear out (or sooner) I wanted to go an 18" wheel. Just saw these while surfing. http://www.buyfordmotorsport.com/wheels.htm New Cobra R wheels, 18x9.5, silver, for $175.00. Chromes are $300. Although I haven't tried to price them, that seem's pretty cheap, especially compared to after markets I've seen. If I put 285's on the front, how wide can I go in the back? Thanks.