Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/65-20 | 315/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.49 (774.5) | 34.36 (872.8) | 3.87 (98.3) 12.7% |
| Width inches (mm) | 8.07 (205) | 12.4 (315) | 4.33 (110) 53.7% |
| Circum. inches (mm) | 95.79 (2433.16) | 107.95 (2741.98) | 12.16 (308.82) 12.7% |
| Sidewall Height inches (mm) | 5.25 (133.25) | 8.68 (220.5) | 3.44 (87.25) 65.5% |
| Revolutions per mile (km) | 661.42 (410.99) | 586.93 (364.7) | -74.49 (-46.29) -11.3% |
315/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.54 mph (36.27 km/h) |
| 25 mph (40.23 km/h) | 28.17 mph (45.34 km/h) |
| 30 mph (48.28 km/h) | 33.81 mph (54.41 km/h) |
| 35 mph (56.33 km/h) | 39.44 mph (63.48 km/h) |
| 40 mph (64.37 km/h) | 45.08 mph (72.54 km/h) |
| 45 mph (72.42 km/h) | 50.71 mph (81.61 km/h) |
| 50 mph (80.47 km/h) | 56.35 mph (90.68 km/h) |
| 55 mph (88.51 km/h) | 61.98 mph (99.75 km/h) |
| 60 mph (96.56 km/h) | 67.62 mph (108.82 km/h) |
| 65 mph (104.61 km/h) | 73.25 mph (117.88 km/h) |
| 70 mph (112.65 km/h) | 78.88 mph (126.95 km/h) |
| 75 mph (120.7 km/h) | 84.52 mph (136.02 km/h) |
| 80 mph (128.75 km/h) | 90.15 mph (145.09 km/h) |
| 85 mph (136.79 km/h) | 95.79 mph (154.16 km/h) |
| 90 mph (144.84 km/h) | 101.42 mph (163.22 km/h) |
| 95 mph (152.89 km/h) | 107.06 mph (172.29 km/h) |
| 100 mph (160.93 km/h) | 112.69 mph (181.36 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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