Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-15 | 315/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.6 (853.5) | 38.6 (980.5) | 5 (127) 14.9% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 105.56 (2681.35) | 121.27 (3080.33) | 15.71 (398.98) 14.9% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 9.3 (236.25) | 0 (0) 0% |
| Revolutions per mile (km) | 600.2 (372.95) | 522.46 (324.64) | -77.74 (-48.31) -13% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.98 mph (36.98 km/h) |
| 25 mph (40.23 km/h) | 28.72 mph (46.22 km/h) |
| 30 mph (48.28 km/h) | 34.46 mph (55.46 km/h) |
| 35 mph (56.33 km/h) | 40.21 mph (64.71 km/h) |
| 40 mph (64.37 km/h) | 45.95 mph (73.95 km/h) |
| 45 mph (72.42 km/h) | 51.7 mph (83.2 km/h) |
| 50 mph (80.47 km/h) | 57.44 mph (92.44 km/h) |
| 55 mph (88.51 km/h) | 63.18 mph (101.68 km/h) |
| 60 mph (96.56 km/h) | 68.93 mph (110.93 km/h) |
| 65 mph (104.61 km/h) | 74.67 mph (120.17 km/h) |
| 70 mph (112.65 km/h) | 80.42 mph (129.42 km/h) |
| 75 mph (120.7 km/h) | 86.16 mph (138.66 km/h) |
| 80 mph (128.75 km/h) | 91.9 mph (147.91 km/h) |
| 85 mph (136.79 km/h) | 97.65 mph (157.15 km/h) |
| 90 mph (144.84 km/h) | 103.39 mph (166.39 km/h) |
| 95 mph (152.89 km/h) | 109.14 mph (175.64 km/h) |
| 100 mph (160.93 km/h) | 114.88 mph (184.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1330 | 1545 | 1663 | 1737 | 1816 | 1873 | 1935 | 2008 | 2110 | 2212 | 2325 | 2416 | 2580 | 2761 | 2902 | 2993 | 3044 | 3231 | 3491 | 4057 |
Better Fuel Economy Factory Ratios Increased Power
