Tire size calculator
Thinking about 33s or 35s? Put in your current size and the one you want. See how much taller it sits, what it does to your speedometer, and get it quoted.
Compare two tire sizes
Type a size from the sidewall, like 265/70R17 or 35x12.50R20. Your current size is printed on the tires you have now.
| Measurement | Current | New | Change |
|---|---|---|---|
| Overall height | |||
| Tread width | |||
| Sidewall | |||
| Circumference | |||
| Revs per mile | |||
| Wheel size |
Numbers are calculated from the size on the sidewall. Real tires vary a little by brand and tread. Whether a size fits without rubbing depends on your vehicle, wheels and suspension, so we check that before you buy. Also see lift and leveling kits and the package builder.
Tire size questions
How do I read a tire size like 275/60R20?
275 is the tread width in millimeters, 60 means the sidewall is 60% as tall as the tire is wide, and 20 is the wheel diameter in inches. Off-road sizes like 35x12.50R20 give the overall height (35 inches) and width (12.5 inches) directly.
Will bigger tires mess up my speedometer?
Taller tires turn fewer times per mile, so the speedometer reads slow. The calculator shows the real speed next to what the dash says. Past about a 3% change it is usually worth recalibrating, and we can tell you what that takes on your vehicle.
Will a bigger tire fit without a lift?
Sometimes. It depends on the truck, the wheel width and offset, and how the suspension is set up. A leveling kit often makes room for one size up, and a lift for more. Send us the size and your vehicle and we will tell you what it needs to fit without rubbing.