Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/80-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.32 (821) | 30.98 (786.84) | -1.34 (-34.16) -4.2% |
| Width inches (mm) | 10.83 (275) | 10.51 (267) | -0.31 (-8) -2.9% |
| Circum. inches (mm) | 101.55 (2579.25) | 97.32 (2471.93) | -4.23 (-107.32) -4.2% |
| Sidewall Height inches (mm) | 8.66 (220) | 7.99 (202.92) | -0.67 (-17.08) -7.8% |
| Revolutions per mile (km) | 623.96 (387.71) | 651.05 (404.54) | 27.09 (16.83) 4.3% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.17 mph (30.85 km/h) |
| 25 mph (40.23 km/h) | 23.96 mph (38.56 km/h) |
| 30 mph (48.28 km/h) | 28.75 mph (46.27 km/h) |
| 35 mph (56.33 km/h) | 33.54 mph (53.98 km/h) |
| 40 mph (64.37 km/h) | 38.34 mph (61.7 km/h) |
| 45 mph (72.42 km/h) | 43.13 mph (69.41 km/h) |
| 50 mph (80.47 km/h) | 47.92 mph (77.12 km/h) |
| 55 mph (88.51 km/h) | 52.71 mph (84.83 km/h) |
| 60 mph (96.56 km/h) | 57.5 mph (92.54 km/h) |
| 65 mph (104.61 km/h) | 62.3 mph (100.26 km/h) |
| 70 mph (112.65 km/h) | 67.09 mph (107.97 km/h) |
| 75 mph (120.7 km/h) | 71.88 mph (115.68 km/h) |
| 80 mph (128.75 km/h) | 76.67 mph (123.39 km/h) |
| 85 mph (136.79 km/h) | 81.46 mph (131.1 km/h) |
| 90 mph (144.84 km/h) | 86.26 mph (138.81 km/h) |
| 95 mph (152.89 km/h) | 91.05 mph (146.53 km/h) |
| 100 mph (160.93 km/h) | 95.84 mph (154.24 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
