Tire Size

2007 FORD MUSTANG
34,000 MILES • 4.6L • V8 • RWD • MANUAL
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GTEUP07
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I am currently running 245/35/20 front and 295/30/20 rear tires. I want more tire for a softer ride. I put on Steeda Sport lowering springs 1" lower now. can I run something like 245/40/20 and 275/35/20 front and rear respectfully? I understand the middle number like the 40 and 35 numbers that can provide a softer ride I think. But I do not want the tires so tall that they rub the wheel wells. Please advise.
May 14, 2016 at 12:22 AM
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WRENCHTECH
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It would be more like 235/40/20 = 245/35/20 and 285/35/20 = 295/30/20 to maintain original height and circumference.
May 14, 2016 at 4:35 AM
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GTEUP07
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Do you mean original height and circumference of the 17" or 18" tires that came on it or to match what is on it now?
Thanks
May 14, 2016 at 8:37 AM
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GTEUP07
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Here is what it looks like with 245/35/20 and 295/30/20.
Image (Click to enlarge)
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May 14, 2016 at 8:42 AM
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WRENCHTECH
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It matters that the tires have the same original circumference as the tires the factory engineered it for.
May 14, 2016 at 8:53 AM
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GTEUP07
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So your numbers do exactly that right? Thank you.
May 14, 2016 at 9:00 AM
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WRENCHTECH
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My numbers matched the tire size you gave me. I do not know what it came with.
May 14, 2016 at 9:02 AM
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GTEUP07
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Got it. Thanks. OEM size is:
235/50R18
May 14, 2016 at 10:14 AM