I have a 1990 GT with Ford 1" Lowering Springs. I'm looking to buy 17x8/9" (front and back respectively) with 245 45 R17 tires in front, and 275 45 R17 in the rear. Will I have any clearance issues?? The car currently has 16" wheels.
The front will be close, those tires should be a little less diameter then stock
Not sure how wide you can go in the back but someone will know
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1988 Mustang GT, TTops, 306, AOD with 4r70w gearset and shiftkit, E303 Cam, Ford Racing headers, BBK H-pipe, Flowmaster Cat Back, 3.73's, Traction lok with F150 spring, Eibach lowering kit, B&M Tork Master 2400 Converter, trans cooler, C&L 76mm Mass Air, Accufab 70mm throttle body, K&N filter, Mass Air conversion, Subframe connectors, Lots of Polyurethane, 210HP at 4500rpm, 272 Torque at 3600rpm at the wheels, best 1/4 mile: 14.12
Unless the front fenders have been changed to 1991-1993 style with the bigger openings, those wheels will be too big for the front. 245 will have lots of tire rub, you'd even have rubbing with 235 at full turn.
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It depends on where you buy your rims and tires from I have 245-45-17s on my front and I dont rub one bit granted Iam not lowered. But I will attach pictures and you will be able to see I could lower if I wanted to. American Muscle .com call them site sponser can answer all your wheel questions. I called them three times before I bought my rims and tires. They told me the only way I would rub is if i was lowered more than 1.5 inch. plus shipping is only $15 dollars on the whole order. These guys have the correct backspacing on the rims so you wont rub.
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1990 5.0 lx, 302 saleen votech intake, bbk 75mm throttle body, cold air intake, bbk headers and exhaust all the way back, bbk traction bars, 373 gears, aod with a shift kit
Iam sorry they actually have free shipping I was thinking of another site I order from.
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1990 5.0 lx, 302 saleen votech intake, bbk 75mm throttle body, cold air intake, bbk headers and exhaust all the way back, bbk traction bars, 373 gears, aod with a shift kit
1990 Mustang GT Wheel Clearance Question 
