I have a 98 ford F150 with a ford racing lowering kit 2in front 4in back.(in the mail) I have purchased FR500 mustang wheels for it.(18x9 and 18x10) Being mustang rims I have purchased spacers that will make them fit.(1.5in wide) I was wondering what tire sizes I should get? I was thinking of going with the 285/45/18 up front but the rear tires have me stumped.
Any help would be very much appreciated.
Thanks

 

It's hard to say since you bought a wheel for a different vehicle and then added an adaptor which will probably make fitment problems worse.