Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 33/12.5-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.03 (838.92) | 30.98 (786.84) | -2.05 (-52.08) -6.2% |
| Width inches (mm) | 12.52 (318) | 10.51 (267) | -2.01 (-51) -16% |
| Circum. inches (mm) | 103.76 (2635.54) | 97.32 (2471.93) | -6.44 (-163.61) -6.2% |
| Sidewall Height inches (mm) | 9.01 (228.96) | 7.99 (202.92) | -1.03 (-26.04) -11.4% |
| Revolutions per mile (km) | 610.63 (379.43) | 651.05 (404.54) | 40.42 (25.11) 6.6% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.76 mph (30.19 km/h) |
| 25 mph (40.23 km/h) | 23.45 mph (37.74 km/h) |
| 30 mph (48.28 km/h) | 28.14 mph (45.28 km/h) |
| 35 mph (56.33 km/h) | 32.83 mph (52.83 km/h) |
| 40 mph (64.37 km/h) | 37.52 mph (60.38 km/h) |
| 45 mph (72.42 km/h) | 42.21 mph (67.92 km/h) |
| 50 mph (80.47 km/h) | 46.9 mph (75.47 km/h) |
| 55 mph (88.51 km/h) | 51.59 mph (83.02 km/h) |
| 60 mph (96.56 km/h) | 56.28 mph (90.57 km/h) |
| 65 mph (104.61 km/h) | 60.96 mph (98.11 km/h) |
| 70 mph (112.65 km/h) | 65.65 mph (105.66 km/h) |
| 75 mph (120.7 km/h) | 70.34 mph (113.21 km/h) |
| 80 mph (128.75 km/h) | 75.03 mph (120.76 km/h) |
| 85 mph (136.79 km/h) | 79.72 mph (128.3 km/h) |
| 90 mph (144.84 km/h) | 84.41 mph (135.85 km/h) |
| 95 mph (152.89 km/h) | 89.1 mph (143.4 km/h) |
| 100 mph (160.93 km/h) | 93.79 mph (150.94 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
