Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.08 (687.72) | 30.98 (786.84) | 3.9 (99.12) 14.4% |
| Width inches (mm) | 8.5 (216) | 10.51 (267) | 2.01 (51) 23.6% |
| Circum. inches (mm) | 85.06 (2160.54) | 97.32 (2471.93) | 12.26 (311.39) 14.4% |
| Sidewall Height inches (mm) | 6.04 (153.36) | 7.99 (202.92) | 1.95 (49.56) 32.3% |
| Revolutions per mile (km) | 744.88 (462.85) | 651.05 (404.54) | -93.83 (-58.31) -12.6% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.88 mph (36.83 km/h) |
| 25 mph (40.23 km/h) | 28.6 mph (46.03 km/h) |
| 30 mph (48.28 km/h) | 34.32 mph (55.24 km/h) |
| 35 mph (56.33 km/h) | 40.04 mph (64.45 km/h) |
| 40 mph (64.37 km/h) | 45.77 mph (73.65 km/h) |
| 45 mph (72.42 km/h) | 51.49 mph (82.86 km/h) |
| 50 mph (80.47 km/h) | 57.21 mph (92.06 km/h) |
| 55 mph (88.51 km/h) | 62.93 mph (101.27 km/h) |
| 60 mph (96.56 km/h) | 68.65 mph (110.48 km/h) |
| 65 mph (104.61 km/h) | 74.37 mph (119.68 km/h) |
| 70 mph (112.65 km/h) | 80.09 mph (128.89 km/h) |
| 75 mph (120.7 km/h) | 85.81 mph (138.1 km/h) |
| 80 mph (128.75 km/h) | 91.53 mph (147.3 km/h) |
| 85 mph (136.79 km/h) | 97.25 mph (156.51 km/h) |
| 90 mph (144.84 km/h) | 102.97 mph (165.72 km/h) |
| 95 mph (152.89 km/h) | 108.69 mph (174.92 km/h) |
| 100 mph (160.93 km/h) | 114.41 mph (184.13 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
