It's just a pain in the arse as I'm in the UK, there's not a lot of mustang info. Why does American muscle state that 18x10 and 20x10 don't fit on the front when some of you guys in the USA are using them up front ?
AM, like just about any other wheel mass-marketer, is going to be very conservative in their wheel recommendations. My best guess is that they don't want to be fielding endless calls with various complaints and problems involving fitment or rubbing. Nor are they in the business of doing what could literally be hundreds of individual design projects. Keep in mind that they have no control over what tire sizes any given customer will actually try to use on them.
10" wide wheels in any diameter from 18 to 20 is almost a no-brainer, with offsets of about +42 working at either end of the car without rubbing on the inside or sticking out past the fender. With 275/xx tires, anyway.
10" really isn't all that "aggressive". Not when Ford itself used 18x9.5 for their 2008-ish GT500 and when even 11's are possible (see sig pic
). Maybe even without spacers.
Also a gt500 style wheel that won't clear gt500 brakes according to AM ,where's the logic in that. There's a customer picture I think that shows them on a gt500.
Read carefully . . . GT500
style does not mean anything more than the external appearance looks like a GT500 wheel. A GT500
-style wheel could be of any diameter, any width, any offset, and have spokes of any backside contour. Most 18" and larger wheels that are not OK'ed to fit GT500 (Brembo) brakes have a problem with spoke clearance (the 4-piston Brembo calipers stick out further on the wheel side and need the wheel spokes to be curved deeper to clear).
If you have any thoughts at all of upgrading to Brembo brakes, make sure that the wheels you choose are listed to fit a real GT500.
Norm