Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/50-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.83 (656) | 30.98 (786.84) | 5.15 (130.84) 19.9% |
| Width inches (mm) | 10.83 (275) | 10.51 (267) | -0.31 (-8) -2.9% |
| Circum. inches (mm) | 81.14 (2060.88) | 97.32 (2471.93) | 16.18 (411.05) 19.9% |
| Sidewall Height inches (mm) | 5.41 (137.5) | 7.99 (202.92) | 2.58 (65.42) 47.6% |
| Revolutions per mile (km) | 780.9 (485.23) | 651.05 (404.54) | -129.85 (-80.69) -16.6% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.99 mph (38.61 km/h) |
| 25 mph (40.23 km/h) | 29.99 mph (48.26 km/h) |
| 30 mph (48.28 km/h) | 35.98 mph (57.91 km/h) |
| 35 mph (56.33 km/h) | 41.98 mph (67.56 km/h) |
| 40 mph (64.37 km/h) | 47.98 mph (77.21 km/h) |
| 45 mph (72.42 km/h) | 53.98 mph (86.86 km/h) |
| 50 mph (80.47 km/h) | 59.97 mph (96.52 km/h) |
| 55 mph (88.51 km/h) | 65.97 mph (106.17 km/h) |
| 60 mph (96.56 km/h) | 71.97 mph (115.82 km/h) |
| 65 mph (104.61 km/h) | 77.96 mph (125.47 km/h) |
| 70 mph (112.65 km/h) | 83.96 mph (135.12 km/h) |
| 75 mph (120.7 km/h) | 89.96 mph (144.77 km/h) |
| 80 mph (128.75 km/h) | 95.96 mph (154.43 km/h) |
| 85 mph (136.79 km/h) | 101.95 mph (164.08 km/h) |
| 90 mph (144.84 km/h) | 107.95 mph (173.73 km/h) |
| 95 mph (152.89 km/h) | 113.95 mph (183.38 km/h) |
| 100 mph (160.93 km/h) | 119.95 mph (193.03 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
