Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 315/75-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 35.6 (904.3) | 0.13 (3.3) 0.4% |
| Width inches (mm) | 12.8 (325) | 12.4 (315) | -0.39 (-10) -3.1% |
| Circum. inches (mm) | 111.44 (2830.57) | 111.85 (2840.94) | 0.41 (10.37) 0.4% |
| Sidewall Height inches (mm) | 10.24 (260) | 9.3 (236.25) | -0.94 (-23.75) -9.1% |
| Revolutions per mile (km) | 568.56 (353.28) | 566.48 (352) | -2.07 (-1.29) -0.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.07 mph (32.3 km/h) |
| 25 mph (40.23 km/h) | 25.09 mph (40.38 km/h) |
| 30 mph (48.28 km/h) | 30.11 mph (48.46 km/h) |
| 35 mph (56.33 km/h) | 35.13 mph (56.53 km/h) |
| 40 mph (64.37 km/h) | 40.15 mph (64.61 km/h) |
| 45 mph (72.42 km/h) | 45.16 mph (72.69 km/h) |
| 50 mph (80.47 km/h) | 50.18 mph (80.76 km/h) |
| 55 mph (88.51 km/h) | 55.2 mph (88.84 km/h) |
| 60 mph (96.56 km/h) | 60.22 mph (96.91 km/h) |
| 65 mph (104.61 km/h) | 65.24 mph (104.99 km/h) |
| 70 mph (112.65 km/h) | 70.26 mph (113.07 km/h) |
| 75 mph (120.7 km/h) | 75.27 mph (121.14 km/h) |
| 80 mph (128.75 km/h) | 80.29 mph (129.22 km/h) |
| 85 mph (136.79 km/h) | 85.31 mph (137.3 km/h) |
| 90 mph (144.84 km/h) | 90.33 mph (145.37 km/h) |
| 95 mph (152.89 km/h) | 95.35 mph (153.45 km/h) |
| 100 mph (160.93 km/h) | 100.37 mph (161.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1442 | 1675 | 1804 | 1883 | 1969 | 2030 | 2098 | 2178 | 2288 | 2399 | 2521 | 2619 | 2797 | 2994 | 3147 | 3245 | 3300 | 3503 | 3785 | 4398 |
Better Fuel Economy Factory Ratios Increased Power
