Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/60-17 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.76 (755.8) | 30.98 (786.84) | 1.22 (31.04) 4.1% |
| Width inches (mm) | 10.63 (270) | 10.51 (267) | -0.12 (-3) -1.1% |
| Circum. inches (mm) | 93.48 (2374.42) | 97.32 (2471.93) | 3.84 (97.52) 4.1% |
| Sidewall Height inches (mm) | 6.38 (162) | 7.99 (202.92) | 1.61 (40.92) 25.3% |
| Revolutions per mile (km) | 677.79 (421.16) | 651.05 (404.54) | -26.74 (-16.61) -3.9% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.82 mph (33.51 km/h) |
| 25 mph (40.23 km/h) | 26.03 mph (41.89 km/h) |
| 30 mph (48.28 km/h) | 31.23 mph (50.26 km/h) |
| 35 mph (56.33 km/h) | 36.44 mph (58.64 km/h) |
| 40 mph (64.37 km/h) | 41.64 mph (67.02 km/h) |
| 45 mph (72.42 km/h) | 46.85 mph (75.39 km/h) |
| 50 mph (80.47 km/h) | 52.05 mph (83.77 km/h) |
| 55 mph (88.51 km/h) | 57.26 mph (92.15 km/h) |
| 60 mph (96.56 km/h) | 62.46 mph (100.53 km/h) |
| 65 mph (104.61 km/h) | 67.67 mph (108.9 km/h) |
| 70 mph (112.65 km/h) | 72.87 mph (117.28 km/h) |
| 75 mph (120.7 km/h) | 78.08 mph (125.66 km/h) |
| 80 mph (128.75 km/h) | 83.29 mph (134.04 km/h) |
| 85 mph (136.79 km/h) | 88.49 mph (142.41 km/h) |
| 90 mph (144.84 km/h) | 93.7 mph (150.79 km/h) |
| 95 mph (152.89 km/h) | 98.9 mph (159.17 km/h) |
| 100 mph (160.93 km/h) | 104.11 mph (167.54 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
