Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/75-16 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.06 (788.9) | 30.98 (786.84) | -0.08 (-2.06) -0.3% |
| Width inches (mm) | 10.04 (255) | 10.51 (267) | 0.47 (12) 4.7% |
| Circum. inches (mm) | 97.57 (2478.4) | 97.32 (2471.93) | -0.25 (-6.47) -0.3% |
| Sidewall Height inches (mm) | 7.53 (191.25) | 7.99 (202.92) | 0.46 (11.67) 6.1% |
| Revolutions per mile (km) | 649.35 (403.48) | 651.05 (404.54) | 1.7 (1.06) 0.3% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.95 mph (32.1 km/h) |
| 25 mph (40.23 km/h) | 24.93 mph (40.13 km/h) |
| 30 mph (48.28 km/h) | 29.92 mph (48.15 km/h) |
| 35 mph (56.33 km/h) | 34.91 mph (56.18 km/h) |
| 40 mph (64.37 km/h) | 39.9 mph (64.21 km/h) |
| 45 mph (72.42 km/h) | 44.88 mph (72.23 km/h) |
| 50 mph (80.47 km/h) | 49.87 mph (80.26 km/h) |
| 55 mph (88.51 km/h) | 54.86 mph (88.28 km/h) |
| 60 mph (96.56 km/h) | 59.84 mph (96.31 km/h) |
| 65 mph (104.61 km/h) | 64.83 mph (104.33 km/h) |
| 70 mph (112.65 km/h) | 69.82 mph (112.36 km/h) |
| 75 mph (120.7 km/h) | 74.8 mph (120.39 km/h) |
| 80 mph (128.75 km/h) | 79.79 mph (128.41 km/h) |
| 85 mph (136.79 km/h) | 84.78 mph (136.44 km/h) |
| 90 mph (144.84 km/h) | 89.76 mph (144.46 km/h) |
| 95 mph (152.89 km/h) | 94.75 mph (152.49 km/h) |
| 100 mph (160.93 km/h) | 99.74 mph (160.51 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1657 | 1925 | 2073 | 2164 | 2263 | 2334 | 2411 | 2503 | 2630 | 2757 | 2898 | 3010 | 3215 | 3440 | 3617 | 3730 | 3793 | 4026 | 4350 | 5055 |
Better Fuel Economy Factory Ratios Increased Power
