ATV/UTV Tire Size Calculator
Read ATV and UTV tire codes. Use the calculator below. Results update as you type.
How the ATV/UTV Tire Size Calculator Works
This calculator works by decoding flotation-style markings such as 27x9-14 into height, width, rim and sidewall. ATV and UTV tires state height first.
- Enter the size, for example 28x10-14.
- Read the height: 28 in (711 mm).
- Read the width: 10 in (254 mm) and the rim: 14 in.
- Read the sidewall: (28 − 14) ÷ 2 = 7.0 in (178 mm).
The Formula
The formula is Sidewall = (Height − Rim) ÷ 2, with all values in inches.
Sidewall (in) = (Height − Rim) ÷ 2 Height (mm) = Height (in) × 25.4 Width (mm) = Width (in) × 25.4Worked example: 32x10-15 has a sidewall of (32 − 15) ÷ 2 = 8.5 in (216 mm).
The dash (-) marks bias-ply construction. An R in its place marks radial construction.
Conversion Table
The conversion table decodes 10 ATV and UTV sizes from 23x7-10 to 35x10-15. Heights run from 584 mm to 889 mm.
Sport ATVs use 20–23 in tires. Utility ATVs use 25–27 in. Sport UTVs use 28–35 in.
| Size | Height (in / mm) | Width (in / mm) | Rim (in) | Sidewall (in) |
|---|---|---|---|---|
| 23x7-10 | 23 / 584 | 7 / 178 | 10 | 6.5 |
| 25x8-12 | 25 / 635 | 8 / 203 | 12 | 6.5 |
| 25x10-12 | 25 / 635 | 10 / 254 | 12 | 6.5 |
| 26x9-14 | 26 / 660 | 9 / 229 | 14 | 6.0 |
| 27x9-14 | 27 / 686 | 9 / 229 | 14 | 6.5 |
| 27x11-14 | 27 / 686 | 11 / 279 | 14 | 6.5 |
| 28x10-14 | 28 / 711 | 10 / 254 | 14 | 7.0 |
| 30x10-14 | 30 / 762 | 10 / 254 | 14 | 8.0 |
| 32x10-15 | 32 / 813 | 10 / 254 | 15 | 8.5 |
| 35x10-15 | 35 / 889 | 10 / 254 | 15 | 10.0 |
What Is the ATV/UTV Tire Size Calculator?
The ATV/UTV Tire Size Calculator is a tool that decodes the flotation-style tire sizes used on all-terrain vehicles (ATVs) and utility task vehicles (UTVs). These tires use inches for all 3 dimensions.
Many ATV and UTV owners upsize for clearance. Larger tires change speedometer readings, clutch engagement and belt load on CVT-driven vehicles.
Common Uses
This calculator has 4 uses: tire upgrades, clutch tuning, speedometer checks and clearance planning.
- Upgrade tires: Compare stock and larger sizes.
- Tune clutches: Plan clutch changes for taller tires.
- Check speedometers: Find the speed error after upsizing.
- Plan clearance: Measure the ground clearance gain.