Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 80/70-17 | 385/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.41 (543.8) | 38.22 (970.8) | 16.81 (427) 78.5% |
| Width inches (mm) | 3.15 (80) | 15.16 (385) | 12.01 (305) 381.3% |
| Circum. inches (mm) | 67.26 (1708.4) | 120.07 (3049.86) | 52.81 (1341.46) 78.5% |
| Sidewall Height inches (mm) | 2.2 (56) | 10.61 (269.5) | 8.41 (213.5) 381.3% |
| Revolutions per mile (km) | 942.02 (585.34) | 527.68 (327.88) | -414.34 (-257.46) -44% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 35.7 mph (57.46 km/h) |
| 25 mph (40.23 km/h) | 44.63 mph (71.83 km/h) |
| 30 mph (48.28 km/h) | 53.56 mph (86.19 km/h) |
| 35 mph (56.33 km/h) | 62.48 mph (100.56 km/h) |
| 40 mph (64.37 km/h) | 71.41 mph (114.92 km/h) |
| 45 mph (72.42 km/h) | 80.33 mph (129.29 km/h) |
| 50 mph (80.47 km/h) | 89.26 mph (143.65 km/h) |
| 55 mph (88.51 km/h) | 98.19 mph (158.02 km/h) |
| 60 mph (96.56 km/h) | 107.11 mph (172.38 km/h) |
| 65 mph (104.61 km/h) | 116.04 mph (186.75 km/h) |
| 70 mph (112.65 km/h) | 124.97 mph (201.11 km/h) |
| 75 mph (120.7 km/h) | 133.89 mph (215.48 km/h) |
| 80 mph (128.75 km/h) | 142.82 mph (229.84 km/h) |
| 85 mph (136.79 km/h) | 151.74 mph (244.21 km/h) |
| 90 mph (144.84 km/h) | 160.67 mph (258.57 km/h) |
| 95 mph (152.89 km/h) | 169.6 mph (272.94 km/h) |
| 100 mph (160.93 km/h) | 178.52 mph (287.3 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1343 | 1560 | 1680 | 1754 | 1834 | 1891 | 1954 | 2029 | 2131 | 2234 | 2349 | 2440 | 2606 | 2789 | 2931 | 3023 | 3074 | 3263 | 3526 | 4097 |
Better Fuel Economy Factory Ratios Increased Power
