Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 180/60-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 25.5 (647.8) | 1.14 (29) 4.7% |
| Width inches (mm) | 6.69 (170) | 7.09 (180) | 0.39 (10) 5.9% |
| Circum. inches (mm) | 76.54 (1944.02) | 80.12 (2035.12) | 3.59 (91.11) 4.7% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 4.25 (108) | 0.57 (14.5) 15.5% |
| Revolutions per mile (km) | 827.84 (514.4) | 790.78 (491.37) | -37.06 (-23.03) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.7 km/h) |
| 25 mph (40.23 km/h) | 26.17 mph (42.12 km/h) |
| 30 mph (48.28 km/h) | 31.41 mph (50.54 km/h) |
| 35 mph (56.33 km/h) | 36.64 mph (58.97 km/h) |
| 40 mph (64.37 km/h) | 41.87 mph (67.39 km/h) |
| 45 mph (72.42 km/h) | 47.11 mph (75.81 km/h) |
| 50 mph (80.47 km/h) | 52.34 mph (84.24 km/h) |
| 55 mph (88.51 km/h) | 57.58 mph (92.66 km/h) |
| 60 mph (96.56 km/h) | 62.81 mph (101.09 km/h) |
| 65 mph (104.61 km/h) | 68.05 mph (109.51 km/h) |
| 70 mph (112.65 km/h) | 73.28 mph (117.93 km/h) |
| 75 mph (120.7 km/h) | 78.51 mph (126.36 km/h) |
| 80 mph (128.75 km/h) | 83.75 mph (134.78 km/h) |
| 85 mph (136.79 km/h) | 88.98 mph (143.21 km/h) |
| 90 mph (144.84 km/h) | 94.22 mph (151.63 km/h) |
| 95 mph (152.89 km/h) | 99.45 mph (160.05 km/h) |
| 100 mph (160.93 km/h) | 104.69 mph (168.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2012 | 2338 | 2518 | 2629 | 2749 | 2834 | 2929 | 3040 | 3194 | 3348 | 3520 | 3657 | 3905 | 4179 | 4393 | 4530 | 4607 | 4890 | 5284 | 6140 |
Better Fuel Economy Factory Ratios Increased Power
