Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/45-17 | 315/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.52 (724.3) | 29.88 (759) | 1.37 (34.7) 4.8% |
| Width inches (mm) | 12.8 (325) | 12.4 (315) | -0.39 (-10) -3.1% |
| Circum. inches (mm) | 89.58 (2275.46) | 93.88 (2384.47) | 4.29 (109.01) 4.8% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 7.44 (189) | 1.68 (42.75) 29.2% |
| Revolutions per mile (km) | 707.26 (439.47) | 674.93 (419.38) | -32.33 (-20.09) -4.6% |
315/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.96 mph (33.73 km/h) |
| 25 mph (40.23 km/h) | 26.2 mph (42.16 km/h) |
| 30 mph (48.28 km/h) | 31.44 mph (50.59 km/h) |
| 35 mph (56.33 km/h) | 36.68 mph (59.03 km/h) |
| 40 mph (64.37 km/h) | 41.92 mph (67.46 km/h) |
| 45 mph (72.42 km/h) | 47.16 mph (75.89 km/h) |
| 50 mph (80.47 km/h) | 52.4 mph (84.32 km/h) |
| 55 mph (88.51 km/h) | 57.63 mph (92.75 km/h) |
| 60 mph (96.56 km/h) | 62.87 mph (101.19 km/h) |
| 65 mph (104.61 km/h) | 68.11 mph (109.62 km/h) |
| 70 mph (112.65 km/h) | 73.35 mph (118.05 km/h) |
| 75 mph (120.7 km/h) | 78.59 mph (126.48 km/h) |
| 80 mph (128.75 km/h) | 83.83 mph (134.92 km/h) |
| 85 mph (136.79 km/h) | 89.07 mph (143.35 km/h) |
| 90 mph (144.84 km/h) | 94.31 mph (151.78 km/h) |
| 95 mph (152.89 km/h) | 99.55 mph (160.21 km/h) |
| 100 mph (160.93 km/h) | 104.79 mph (168.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1718 | 1995 | 2149 | 2244 | 2346 | 2419 | 2500 | 2595 | 2726 | 2858 | 3004 | 3121 | 3333 | 3567 | 3749 | 3866 | 3932 | 4173 | 4510 | 5240 |
Better Fuel Economy Factory Ratios Increased Power
