Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-15 | 31/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.6 (853.5) | 30.98 (786.84) | -2.62 (-66.66) -7.8% |
| Width inches (mm) | 12.4 (315) | 10.51 (267) | -1.89 (-48) -15.2% |
| Circum. inches (mm) | 105.56 (2681.35) | 97.32 (2471.93) | -8.24 (-209.42) -7.8% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 7.99 (202.92) | -1.31 (-33.33) -14.1% |
| Revolutions per mile (km) | 600.2 (372.95) | 651.05 (404.54) | 50.85 (31.6) 8.5% |
31/10.5-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.44 mph (29.67 km/h) |
| 25 mph (40.23 km/h) | 23.05 mph (37.09 km/h) |
| 30 mph (48.28 km/h) | 27.66 mph (44.51 km/h) |
| 35 mph (56.33 km/h) | 32.27 mph (51.93 km/h) |
| 40 mph (64.37 km/h) | 36.88 mph (59.35 km/h) |
| 45 mph (72.42 km/h) | 41.49 mph (66.76 km/h) |
| 50 mph (80.47 km/h) | 46.09 mph (74.18 km/h) |
| 55 mph (88.51 km/h) | 50.7 mph (81.6 km/h) |
| 60 mph (96.56 km/h) | 55.31 mph (89.02 km/h) |
| 65 mph (104.61 km/h) | 59.92 mph (96.44 km/h) |
| 70 mph (112.65 km/h) | 64.53 mph (103.86 km/h) |
| 75 mph (120.7 km/h) | 69.14 mph (111.27 km/h) |
| 80 mph (128.75 km/h) | 73.75 mph (118.69 km/h) |
| 85 mph (136.79 km/h) | 78.36 mph (126.11 km/h) |
| 90 mph (144.84 km/h) | 82.97 mph (133.53 km/h) |
| 95 mph (152.89 km/h) | 87.58 mph (140.95 km/h) |
| 100 mph (160.93 km/h) | 92.19 mph (148.37 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
