Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/75-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.29 (718.5) | 30.98 (786.84) | 2.69 (68.34) 9.5% |
| Width inches (mm) | 8.86 (225) | 10.51 (267) | 1.65 (42) 18.7% |
| Circum. inches (mm) | 88.87 (2257.23) | 97.32 (2471.93) | 8.45 (214.7) 9.5% |
| Sidewall Height inches (mm) | 6.64 (168.75) | 7.99 (202.92) | 1.35 (34.17) 20.2% |
| Revolutions per mile (km) | 712.97 (443.02) | 651.05 (404.54) | -61.92 (-38.48) -8.7% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.9 mph (35.25 km/h) |
| 25 mph (40.23 km/h) | 27.38 mph (44.06 km/h) |
| 30 mph (48.28 km/h) | 32.85 mph (52.87 km/h) |
| 35 mph (56.33 km/h) | 38.33 mph (61.68 km/h) |
| 40 mph (64.37 km/h) | 43.8 mph (70.5 km/h) |
| 45 mph (72.42 km/h) | 49.28 mph (79.31 km/h) |
| 50 mph (80.47 km/h) | 54.76 mph (88.12 km/h) |
| 55 mph (88.51 km/h) | 60.23 mph (96.93 km/h) |
| 60 mph (96.56 km/h) | 65.71 mph (105.75 km/h) |
| 65 mph (104.61 km/h) | 71.18 mph (114.56 km/h) |
| 70 mph (112.65 km/h) | 76.66 mph (123.37 km/h) |
| 75 mph (120.7 km/h) | 82.13 mph (132.18 km/h) |
| 80 mph (128.75 km/h) | 87.61 mph (140.99 km/h) |
| 85 mph (136.79 km/h) | 93.08 mph (149.81 km/h) |
| 90 mph (144.84 km/h) | 98.56 mph (158.62 km/h) |
| 95 mph (152.89 km/h) | 104.04 mph (167.43 km/h) |
| 100 mph (160.93 km/h) | 109.51 mph (176.24 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
