Compare tire sizes, calculate speedometer error, and visualize dimensional differences. Find the perfect plus-size or equivalent tire for your vehicle.
| Dimension | Original | New | Difference |
|---|---|---|---|
| Overall Diameter | 25.0" | 25.4" | +0.43" |
| Section Width | 225mm | 235mm | +10mm |
| Sidewall Height | 3.99" | 3.70" | -0.29" |
| Circumference | 78.5" | 79.8" | +1.35" |
| Revs/Mile | 808 | 794 | -14 |
Compare any two tire sizes instantly
Know your true speed with new tires
See tire sizes overlaid for comparison
30+ vehicles with OEM specs
"Finally a tire calculator that shows the speedometer difference at multiple speeds. Exactly what I needed for my plus-one upgrade."
"The visual comparison made it so easy to understand the size difference. Helped me pick the perfect tire for my lifted truck."
"Being able to compare three tire sizes at once saved me so much time when shopping for my Miata track setup."
Use our professional tire comparison calculator to find equivalent sizes, understand speedometer error, and make informed tire buying decisions.