margin of error?

BlakeR · 10-26-2016, 05:21 PM

Do you think I'll be OK with the following setup?
235/55/R18 winter tires have a diameter of 28.2 inches.
The OEM 245/40/R20 have a diameter of 27.7

The winter tires are .5 inches or 1.8% bigger. I guess the only way to know for sure is to put them on, drive around, and hope I can tell if they're rubbing...but before that, what do you think.

Eric SS · 10-26-2016, 05:23 PM

You should be fine with .5" difference in height as that is only 1/4" radius. It has a taller sidewall so probably won't have as wide of a tread since the 235 is measured from the widest part of the tire. That's just my thoughts.

10-26-2016, 05:21 PM	#1
BlakeR 😁😁😁😁😁 Drives: 1ss Join Date: Jul 2016 Location: Detroit Posts: 145	margin of error? Do you think I'll be OK with the following setup? 235/55/R18 winter tires have a diameter of 28.2 inches. The OEM 245/40/R20 have a diameter of 27.7 The winter tires are .5 inches or 1.8% bigger. I guess the only way to know for sure is to put them on, drive around, and hope I can tell if they're rubbing...but before that, what do you think.

10-26-2016, 05:23 PM	#2
Eric SS #becauseracecar Drives: 2016 SS Sedan, 2016 Camaro SS Join Date: May 2015 Location: Phoenix Posts: 2,959	You should be fine with .5" difference in height as that is only 1/4" radius. It has a taller sidewall so probably won't have as wide of a tread since the 235 is measured from the widest part of the tire. That's just my thoughts.

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