Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/75-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.47 (748.5) | 30.98 (786.84) | 1.51 (38.34) 5.1% |
| Width inches (mm) | 9.65 (245) | 10.51 (267) | 0.87 (22) 9% |
| Circum. inches (mm) | 92.58 (2351.48) | 97.32 (2471.93) | 4.74 (120.45) 5.1% |
| Sidewall Height inches (mm) | 7.23 (183.75) | 7.99 (202.92) | 0.75 (19.17) 10.4% |
| Revolutions per mile (km) | 684.4 (425.26) | 651.05 (404.54) | -33.35 (-20.72) -4.9% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.02 mph (33.84 km/h) |
| 25 mph (40.23 km/h) | 26.28 mph (42.29 km/h) |
| 30 mph (48.28 km/h) | 31.54 mph (50.75 km/h) |
| 35 mph (56.33 km/h) | 36.79 mph (59.21 km/h) |
| 40 mph (64.37 km/h) | 42.05 mph (67.67 km/h) |
| 45 mph (72.42 km/h) | 47.31 mph (76.13 km/h) |
| 50 mph (80.47 km/h) | 52.56 mph (84.59 km/h) |
| 55 mph (88.51 km/h) | 57.82 mph (93.05 km/h) |
| 60 mph (96.56 km/h) | 63.07 mph (101.51 km/h) |
| 65 mph (104.61 km/h) | 68.33 mph (109.97 km/h) |
| 70 mph (112.65 km/h) | 73.59 mph (118.42 km/h) |
| 75 mph (120.7 km/h) | 78.84 mph (126.88 km/h) |
| 80 mph (128.75 km/h) | 84.1 mph (135.34 km/h) |
| 85 mph (136.79 km/h) | 89.35 mph (143.8 km/h) |
| 90 mph (144.84 km/h) | 94.61 mph (152.26 km/h) |
| 95 mph (152.89 km/h) | 99.87 mph (160.72 km/h) |
| 100 mph (160.93 km/h) | 105.12 mph (169.18 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
