I have googled away but still find no definite answer. Will a set of 2007 Mustang GT rims fit on my 1994 GT? Would they require spacers or straight on? Thanks all
An inch is about right. Measure your backspacing (lay a straight edge on the backside of wheel and measure from it to the hub mounting surface) on the new wheels and compare that with your factory wheels. Whatever the difference is will be the size spacer you will need.
I'm currently running wheels on my '95 that were designed with '05+ backspacing (18x8.5" front and 18x10" rear). I run a 6mm spacer (.25") up front to clear the Cobra brakes and a 25mm (1") spacer out back.