Biggest tire width you can fit on a 2007 mustang?

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03-06-2014, 06:26 PM

Saleen Enthusiast

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Join Date: Mar 2014

Location: Iowa

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Biggest tire width you can fit on a 2007 mustang?

I've been looking at purchasing some street compound Mickey Thompson tires, but it's not really worth it unless you can actually see the width difference. I'm wondering if I could fit like 15"s tread width on the rear wheels of my car.

If not what is the biggest tread width I can fit on my car? And can someone link me to a site where I can find such tires.

Also is there anything I would have to do to fit bigger tires on the rear wheels?

Current rim diameter is 18", and the width is either 8.5 or 9".

03-06-2014, 09:01 PM

Soldier GT

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Location: MO/ Born and raised in Louisiana

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Welcome to the forums!

03-14-2014, 08:27 AM

Norm Peterson

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Your 2007 18" wheels are 8.5" wide, which means that you should not even be looking at tires wider than 255/45-18 unless you're also looking at wider wheels.

18 x 9.5 x ET+45 wheels will support up to 285/40 (this was the early GT500 rear wheel and tire setup). 18 x 10's in ET+43 will also work with that size, and possibly 295-wide tires. ET is shorthand for offset.

With a very careful choice of offset 18 x 11 wheels will fit back there with 295/35-18 tires. Google Vorshlag.com

Norm