Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 28/9-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.98 (710.76) | 30.98 (786.84) | 3 (76.08) 10.7% |
| Width inches (mm) | 9.02 (229) | 10.51 (267) | 1.5 (38) 16.6% |
| Circum. inches (mm) | 87.91 (2232.92) | 97.32 (2471.93) | 9.41 (239.01) 10.7% |
| Sidewall Height inches (mm) | 6.49 (164.88) | 7.99 (202.92) | 1.5 (38.04) 23.1% |
| Revolutions per mile (km) | 720.74 (447.84) | 651.05 (404.54) | -69.69 (-43.3) -9.7% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.14 mph (35.63 km/h) |
| 25 mph (40.23 km/h) | 27.68 mph (44.54 km/h) |
| 30 mph (48.28 km/h) | 33.21 mph (53.45 km/h) |
| 35 mph (56.33 km/h) | 38.75 mph (62.36 km/h) |
| 40 mph (64.37 km/h) | 44.28 mph (71.26 km/h) |
| 45 mph (72.42 km/h) | 49.82 mph (80.17 km/h) |
| 50 mph (80.47 km/h) | 55.35 mph (89.08 km/h) |
| 55 mph (88.51 km/h) | 60.89 mph (97.99 km/h) |
| 60 mph (96.56 km/h) | 66.42 mph (106.9 km/h) |
| 65 mph (104.61 km/h) | 71.96 mph (115.8 km/h) |
| 70 mph (112.65 km/h) | 77.49 mph (124.71 km/h) |
| 75 mph (120.7 km/h) | 83.03 mph (133.62 km/h) |
| 80 mph (128.75 km/h) | 88.56 mph (142.53 km/h) |
| 85 mph (136.79 km/h) | 94.1 mph (151.44 km/h) |
| 90 mph (144.84 km/h) | 99.63 mph (160.35 km/h) |
| 95 mph (152.89 km/h) | 105.17 mph (169.25 km/h) |
| 100 mph (160.93 km/h) | 110.7 mph (178.16 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
