Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 195/75-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.52 (673.5) | 30.98 (786.84) | 4.46 (113.34) 16.8% |
| Width inches (mm) | 7.68 (195) | 10.51 (267) | 2.83 (72) 36.9% |
| Circum. inches (mm) | 83.3 (2115.86) | 97.32 (2471.93) | 14.02 (356.07) 16.8% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 7.99 (202.92) | 2.23 (56.67) 38.7% |
| Revolutions per mile (km) | 760.61 (472.62) | 651.05 (404.54) | -109.56 (-68.08) -14.4% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.37 mph (37.6 km/h) |
| 25 mph (40.23 km/h) | 29.21 mph (47 km/h) |
| 30 mph (48.28 km/h) | 35.05 mph (56.41 km/h) |
| 35 mph (56.33 km/h) | 40.89 mph (65.81 km/h) |
| 40 mph (64.37 km/h) | 46.73 mph (75.21 km/h) |
| 45 mph (72.42 km/h) | 52.57 mph (84.61 km/h) |
| 50 mph (80.47 km/h) | 58.41 mph (94.01 km/h) |
| 55 mph (88.51 km/h) | 64.26 mph (103.41 km/h) |
| 60 mph (96.56 km/h) | 70.1 mph (112.81 km/h) |
| 65 mph (104.61 km/h) | 75.94 mph (122.21 km/h) |
| 70 mph (112.65 km/h) | 81.78 mph (131.61 km/h) |
| 75 mph (120.7 km/h) | 87.62 mph (141.01 km/h) |
| 80 mph (128.75 km/h) | 93.46 mph (150.41 km/h) |
| 85 mph (136.79 km/h) | 99.3 mph (159.81 km/h) |
| 90 mph (144.84 km/h) | 105.15 mph (169.22 km/h) |
| 95 mph (152.89 km/h) | 110.99 mph (178.62 km/h) |
| 100 mph (160.93 km/h) | 116.83 mph (188.02 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
