Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 30/9.5-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.99 (761.78) | 30.98 (786.84) | 0.99 (25.06) 3.3% |
| Width inches (mm) | 9.49 (241) | 10.51 (267) | 1.02 (26) 10.8% |
| Circum. inches (mm) | 94.22 (2393.2) | 97.32 (2471.93) | 3.1 (78.73) 3.3% |
| Sidewall Height inches (mm) | 7.5 (190.39) | 7.99 (202.92) | 0.49 (12.53) 6.6% |
| Revolutions per mile (km) | 672.46 (417.85) | 651.05 (404.54) | -21.42 (-13.31) -3.2% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.66 mph (33.25 km/h) |
| 25 mph (40.23 km/h) | 25.82 mph (41.56 km/h) |
| 30 mph (48.28 km/h) | 30.99 mph (49.87 km/h) |
| 35 mph (56.33 km/h) | 36.15 mph (58.18 km/h) |
| 40 mph (64.37 km/h) | 41.32 mph (66.49 km/h) |
| 45 mph (72.42 km/h) | 46.48 mph (74.8 km/h) |
| 50 mph (80.47 km/h) | 51.64 mph (83.11 km/h) |
| 55 mph (88.51 km/h) | 56.81 mph (91.43 km/h) |
| 60 mph (96.56 km/h) | 61.97 mph (99.74 km/h) |
| 65 mph (104.61 km/h) | 67.14 mph (108.05 km/h) |
| 70 mph (112.65 km/h) | 72.3 mph (116.36 km/h) |
| 75 mph (120.7 km/h) | 77.47 mph (124.67 km/h) |
| 80 mph (128.75 km/h) | 82.63 mph (132.98 km/h) |
| 85 mph (136.79 km/h) | 87.8 mph (141.29 km/h) |
| 90 mph (144.84 km/h) | 92.96 mph (149.61 km/h) |
| 95 mph (152.89 km/h) | 98.13 mph (157.92 km/h) |
| 100 mph (160.93 km/h) | 103.29 mph (166.23 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
