Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/75-18 | 315/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.6 (929.7) | 34.36 (872.8) | -2.24 (-56.9) -6.1% |
| Width inches (mm) | 12.4 (315) | 12.4 (315) | 0 (0) 0% |
| Circum. inches (mm) | 114.99 (2920.74) | 107.95 (2741.98) | -7.04 (-178.76) -6.1% |
| Sidewall Height inches (mm) | 9.3 (236.25) | 8.68 (220.5) | -0.62 (-15.75) -6.7% |
| Revolutions per mile (km) | 551.01 (342.38) | 586.93 (364.7) | 35.92 (22.32) 6.5% |
315/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.22 km/h) |
| 25 mph (40.23 km/h) | 23.47 mph (37.77 km/h) |
| 30 mph (48.28 km/h) | 28.16 mph (45.33 km/h) |
| 35 mph (56.33 km/h) | 32.86 mph (52.88 km/h) |
| 40 mph (64.37 km/h) | 37.55 mph (60.43 km/h) |
| 45 mph (72.42 km/h) | 42.25 mph (67.99 km/h) |
| 50 mph (80.47 km/h) | 46.94 mph (75.54 km/h) |
| 55 mph (88.51 km/h) | 51.63 mph (83.1 km/h) |
| 60 mph (96.56 km/h) | 56.33 mph (90.65 km/h) |
| 65 mph (104.61 km/h) | 61.02 mph (98.21 km/h) |
| 70 mph (112.65 km/h) | 65.72 mph (105.76 km/h) |
| 75 mph (120.7 km/h) | 70.41 mph (113.31 km/h) |
| 80 mph (128.75 km/h) | 75.1 mph (120.87 km/h) |
| 85 mph (136.79 km/h) | 79.8 mph (128.42 km/h) |
| 90 mph (144.84 km/h) | 84.49 mph (135.98 km/h) |
| 95 mph (152.89 km/h) | 89.19 mph (143.53 km/h) |
| 100 mph (160.93 km/h) | 93.88 mph (151.09 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 |
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