Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 27/8.5-14 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.93 (683.92) | 30.98 (786.84) | 4.05 (102.92) 15% |
| Width inches (mm) | 8.5 (216) | 10.51 (267) | 2.01 (51) 23.6% |
| Circum. inches (mm) | 84.59 (2148.6) | 97.32 (2471.93) | 12.73 (323.33) 15% |
| Sidewall Height inches (mm) | 6.46 (164.16) | 7.99 (202.92) | 1.53 (38.76) 23.6% |
| Revolutions per mile (km) | 749.02 (465.42) | 651.05 (404.54) | -97.97 (-60.88) -13.1% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.01 mph (37.03 km/h) |
| 25 mph (40.23 km/h) | 28.76 mph (46.29 km/h) |
| 30 mph (48.28 km/h) | 34.51 mph (55.55 km/h) |
| 35 mph (56.33 km/h) | 40.27 mph (64.8 km/h) |
| 40 mph (64.37 km/h) | 46.02 mph (74.06 km/h) |
| 45 mph (72.42 km/h) | 51.77 mph (83.32 km/h) |
| 50 mph (80.47 km/h) | 57.52 mph (92.58 km/h) |
| 55 mph (88.51 km/h) | 63.28 mph (101.83 km/h) |
| 60 mph (96.56 km/h) | 69.03 mph (111.09 km/h) |
| 65 mph (104.61 km/h) | 74.78 mph (120.35 km/h) |
| 70 mph (112.65 km/h) | 80.53 mph (129.61 km/h) |
| 75 mph (120.7 km/h) | 86.29 mph (138.86 km/h) |
| 80 mph (128.75 km/h) | 92.04 mph (148.12 km/h) |
| 85 mph (136.79 km/h) | 97.79 mph (157.38 km/h) |
| 90 mph (144.84 km/h) | 103.54 mph (166.64 km/h) |
| 95 mph (152.89 km/h) | 109.3 mph (175.9 km/h) |
| 100 mph (160.93 km/h) | 115.05 mph (185.15 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
