Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 317/72-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 34.97 (888.28) | 13.63 (346.28) 63.9% |
| Width inches (mm) | 4.53 (115) | 12.48 (317) | 7.95 (202) 175.7% |
| Circum. inches (mm) | 67.04 (1702.74) | 109.87 (2790.61) | 42.83 (1087.87) 63.9% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 8.99 (228.24) | 5.82 (147.74) 183.5% |
| Revolutions per mile (km) | 945.15 (587.29) | 576.7 (358.34) | -368.45 (-228.94) -39% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 32.78 mph (52.75 km/h) |
| 25 mph (40.23 km/h) | 40.97 mph (65.94 km/h) |
| 30 mph (48.28 km/h) | 49.17 mph (79.13 km/h) |
| 35 mph (56.33 km/h) | 57.36 mph (92.31 km/h) |
| 40 mph (64.37 km/h) | 65.56 mph (105.5 km/h) |
| 45 mph (72.42 km/h) | 73.75 mph (118.69 km/h) |
| 50 mph (80.47 km/h) | 81.94 mph (131.88 km/h) |
| 55 mph (88.51 km/h) | 90.14 mph (145.07 km/h) |
| 60 mph (96.56 km/h) | 98.33 mph (158.25 km/h) |
| 65 mph (104.61 km/h) | 106.53 mph (171.44 km/h) |
| 70 mph (112.65 km/h) | 114.72 mph (184.63 km/h) |
| 75 mph (120.7 km/h) | 122.92 mph (197.82 km/h) |
| 80 mph (128.75 km/h) | 131.11 mph (211 km/h) |
| 85 mph (136.79 km/h) | 139.31 mph (224.19 km/h) |
| 90 mph (144.84 km/h) | 147.5 mph (237.38 km/h) |
| 95 mph (152.89 km/h) | 155.69 mph (250.57 km/h) |
| 100 mph (160.93 km/h) | 163.89 mph (263.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1468 | 1705 | 1836 | 1917 | 2005 | 2067 | 2136 | 2217 | 2329 | 2442 | 2567 | 2667 | 2848 | 3048 | 3204 | 3304 | 3360 | 3566 | 3853 | 4478 |
Better Fuel Economy Factory Ratios Increased Power
