Re: 17x9 +26 wheel question.
99-04 generally fit just fine on the rear of a 05+
I had a set of OEM 17x9 cobra rims that a friend put on his 08 gt, worked fine for the back, the front suck out a bit. The tire height is different, but you dont care about that since you are putting some different tires on them.
Take the rim width, subtract it from the backspacing. That number that you end up with is the frontspacing (how far out the rim sits from the mounting surface). You can compare to your stock tires~ also you can measure how much of the rim is in ward (backspacing) vs your current rim to ensure the wider rim that sits in or out more wont hit anything.
the +26 is a positive offset of 26mm (25.4mm = 1 inch) so its about 1in off center, if I had to guess 17x9 with +26mm off set the backspacing is right about 5.5 inches and the front spacing is 3.5 inches~
2003 Cobra Vert (Redfire) #3938 of 5082 @ 05/27/2003
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2012 Mustang 3.7L M6 (Kona Blue)
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