Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/85-16 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.4 (822.9) | 30.98 (786.84) | -1.42 (-36.06) -4.4% |
| Width inches (mm) | 9.65 (245) | 10.51 (267) | 0.87 (22) 9% |
| Circum. inches (mm) | 101.78 (2585.22) | 97.32 (2471.93) | -4.46 (-113.29) -4.4% |
| Sidewall Height inches (mm) | 8.2 (208.25) | 7.99 (202.92) | -0.21 (-5.33) -2.6% |
| Revolutions per mile (km) | 622.52 (386.81) | 651.05 (404.54) | 28.53 (17.73) 4.6% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.12 mph (30.78 km/h) |
| 25 mph (40.23 km/h) | 23.9 mph (38.47 km/h) |
| 30 mph (48.28 km/h) | 28.69 mph (46.16 km/h) |
| 35 mph (56.33 km/h) | 33.47 mph (53.86 km/h) |
| 40 mph (64.37 km/h) | 38.25 mph (61.55 km/h) |
| 45 mph (72.42 km/h) | 43.03 mph (69.25 km/h) |
| 50 mph (80.47 km/h) | 47.81 mph (76.94 km/h) |
| 55 mph (88.51 km/h) | 52.59 mph (84.64 km/h) |
| 60 mph (96.56 km/h) | 57.37 mph (92.33 km/h) |
| 65 mph (104.61 km/h) | 62.15 mph (100.02 km/h) |
| 70 mph (112.65 km/h) | 66.93 mph (107.72 km/h) |
| 75 mph (120.7 km/h) | 71.71 mph (115.41 km/h) |
| 80 mph (128.75 km/h) | 76.49 mph (123.11 km/h) |
| 85 mph (136.79 km/h) | 81.28 mph (130.8 km/h) |
| 90 mph (144.84 km/h) | 86.06 mph (138.49 km/h) |
| 95 mph (152.89 km/h) | 90.84 mph (146.19 km/h) |
| 100 mph (160.93 km/h) | 95.62 mph (153.88 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
