Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/75-17 | 315/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.3) | 34.36 (872.8) | 2.3 (58.5) 7.2% |
| Width inches (mm) | 10.04 (255) | 12.4 (315) | 2.36 (60) 23.5% |
| Circum. inches (mm) | 100.72 (2558.2) | 107.95 (2741.98) | 7.24 (183.78) 7.2% |
| Sidewall Height inches (mm) | 7.53 (191.25) | 8.68 (220.5) | 1.15 (29.25) 15.3% |
| Revolutions per mile (km) | 629.09 (390.9) | 586.93 (364.7) | -42.17 (-26.2) -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 (43.12 km/h) |
| 30 mph (48.28 km/h) | 32.16 mph (51.75 km/h) |
| 35 mph (56.33 km/h) | 37.51 mph (60.37 km/h) |
| 40 mph (64.37 km/h) | 42.87 mph (69 km/h) |
| 45 mph (72.42 km/h) | 48.23 mph (77.62 km/h) |
| 50 mph (80.47 km/h) | 53.59 mph (86.25 km/h) |
| 55 mph (88.51 km/h) | 58.95 mph (94.87 km/h) |
| 60 mph (96.56 km/h) | 64.31 mph (103.5 km/h) |
| 65 mph (104.61 km/h) | 69.67 mph (112.12 km/h) |
| 70 mph (112.65 km/h) | 75.03 mph (120.75 km/h) |
| 75 mph (120.7 km/h) | 80.39 mph (129.37 km/h) |
| 80 mph (128.75 km/h) | 85.75 mph (138 km/h) |
| 85 mph (136.79 km/h) | 91.11 mph (146.62 km/h) |
| 90 mph (144.84 km/h) | 96.47 mph (155.25 km/h) |
| 95 mph (152.89 km/h) | 101.82 mph (163.87 km/h) |
| 100 mph (160.93 km/h) | 107.18 mph (172.5 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
