Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-18 | 315/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.2) | 34.36 (872.8) | 2.31 (58.6) 7.2% |
| Width inches (mm) | 10.04 (255) | 12.4 (315) | 2.36 (60) 23.5% |
| Circum. inches (mm) | 100.7 (2557.88) | 107.95 (2741.98) | 7.25 (184.1) 7.2% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 8.68 (220.5) | 1.65 (42) 23.5% |
| Revolutions per mile (km) | 629.17 (390.95) | 586.93 (364.7) | -42.24 (-26.25) -6.7% |
315/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.44 mph (34.5 km/h) |
| 25 mph (40.23 km/h) | 26.8 mph (43.13 km/h) |
| 30 mph (48.28 km/h) | 32.16 mph (51.76 km/h) |
| 35 mph (56.33 km/h) | 37.52 mph (60.38 km/h) |
| 40 mph (64.37 km/h) | 42.88 mph (69.01 km/h) |
| 45 mph (72.42 km/h) | 48.24 mph (77.63 km/h) |
| 50 mph (80.47 km/h) | 53.6 mph (86.26 km/h) |
| 55 mph (88.51 km/h) | 58.96 mph (94.88 km/h) |
| 60 mph (96.56 km/h) | 64.32 mph (103.51 km/h) |
| 65 mph (104.61 km/h) | 69.68 mph (112.14 km/h) |
| 70 mph (112.65 km/h) | 75.04 mph (120.76 km/h) |
| 75 mph (120.7 km/h) | 80.4 mph (129.39 km/h) |
| 80 mph (128.75 km/h) | 85.76 mph (138.01 km/h) |
| 85 mph (136.79 km/h) | 91.12 mph (146.64 km/h) |
| 90 mph (144.84 km/h) | 96.48 mph (155.27 km/h) |
| 95 mph (152.89 km/h) | 101.84 mph (163.89 km/h) |
| 100 mph (160.93 km/h) | 107.2 mph (172.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1494 | 1735 | 1869 | 1951 | 2040 | 2104 | 2174 | 2256 | 2371 | 2485 | 2612 | 2714 | 2898 | 3102 | 3261 | 3362 | 3419 | 3629 | 3922 | 4557 |
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