Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/70-18 | 315/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.36 (898.2) | 34.36 (872.8) | -1 (-25.4) -2.8% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 111.09 (2821.78) | 107.95 (2741.98) | -3.14 (-79.8) -2.8% |
| Sidewall Height inches (mm) | 8.68 (220.5) | 8.68 (220.5) | 0 (0) 0% |
| Revolutions per mile (km) | 570.33 (354.39) | 586.93 (364.7) | 16.6 (10.31) 2.9% |
315/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.43 mph (31.28 km/h) |
| 25 mph (40.23 km/h) | 24.29 mph (39.1 km/h) |
| 30 mph (48.28 km/h) | 29.15 mph (46.92 km/h) |
| 35 mph (56.33 km/h) | 34.01 mph (54.73 km/h) |
| 40 mph (64.37 km/h) | 38.87 mph (62.55 km/h) |
| 45 mph (72.42 km/h) | 43.73 mph (70.37 km/h) |
| 50 mph (80.47 km/h) | 48.59 mph (78.19 km/h) |
| 55 mph (88.51 km/h) | 53.44 mph (86.01 km/h) |
| 60 mph (96.56 km/h) | 58.3 mph (93.83 km/h) |
| 65 mph (104.61 km/h) | 63.16 mph (101.65 km/h) |
| 70 mph (112.65 km/h) | 68.02 mph (109.47 km/h) |
| 75 mph (120.7 km/h) | 72.88 mph (117.29 km/h) |
| 80 mph (128.75 km/h) | 77.74 mph (125.11 km/h) |
| 85 mph (136.79 km/h) | 82.6 mph (132.93 km/h) |
| 90 mph (144.84 km/h) | 87.45 mph (140.75 km/h) |
| 95 mph (152.89 km/h) | 92.31 mph (148.56 km/h) |
| 100 mph (160.93 km/h) | 97.17 mph (156.38 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1494 | 1735 | 1869 | 1951 | 2040 | 2104 | 2174 | 2256 | 2371 | 2485 | 2612 | 2714 | 2898 | 3102 | 3261 | 3362 | 3419 | 3629 | 3922 | 4557 |
Better Fuel Economy Factory Ratios Increased Power
