Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/45-17 | 315/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.52 (724.3) | 30.64 (778.3) | 2.13 (54) 7.5% |
| Width inches (mm) | 12.8 (325) | 12.4 (315) | -0.39 (-10) -3.1% |
| Circum. inches (mm) | 89.58 (2275.46) | 96.26 (2445.1) | 6.68 (169.65) 7.5% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 6.82 (173.25) | 1.06 (27) 18.5% |
| Revolutions per mile (km) | 707.26 (439.47) | 658.19 (408.98) | -49.07 (-30.49) -6.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.49 mph (34.59 km/h) |
| 25 mph (40.23 km/h) | 26.86 mph (43.23 km/h) |
| 30 mph (48.28 km/h) | 32.24 mph (51.88 km/h) |
| 35 mph (56.33 km/h) | 37.61 mph (60.53 km/h) |
| 40 mph (64.37 km/h) | 42.98 mph (69.17 km/h) |
| 45 mph (72.42 km/h) | 48.35 mph (77.82 km/h) |
| 50 mph (80.47 km/h) | 53.73 mph (86.47 km/h) |
| 55 mph (88.51 km/h) | 59.1 mph (95.11 km/h) |
| 60 mph (96.56 km/h) | 64.47 mph (103.76 km/h) |
| 65 mph (104.61 km/h) | 69.85 mph (112.41 km/h) |
| 70 mph (112.65 km/h) | 75.22 mph (121.05 km/h) |
| 75 mph (120.7 km/h) | 80.59 mph (129.7 km/h) |
| 80 mph (128.75 km/h) | 85.96 mph (138.35 km/h) |
| 85 mph (136.79 km/h) | 91.34 mph (146.99 km/h) |
| 90 mph (144.84 km/h) | 96.71 mph (155.64 km/h) |
| 95 mph (152.89 km/h) | 102.08 mph (164.29 km/h) |
| 100 mph (160.93 km/h) | 107.46 mph (172.93 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1675 | 1946 | 2095 | 2188 | 2288 | 2359 | 2438 | 2530 | 2659 | 2787 | 2929 | 3043 | 3250 | 3478 | 3656 | 3770 | 3835 | 4070 | 4398 | 5110 |
Better Fuel Economy Factory Ratios Increased Power
