Quote:
Originally Posted by VinnAY
My suggestion as well. When I GPS'd mine it was dead-on with the car and I was on a shorter tire (305/30 > 285/35) not a huge difference but shorter. assuming too that GPS was accurate.
My girls jeep with 22"s/35" tires is off by 4mph (faster).
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When I first got my autox tires (305/30-19 compared to 275/35-20 for daily) I knew going in there would be a 5% difference. So 3 mph at 60, 4 at 80 etc. It's not too difficult to account for once you've figured it out.