Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-17 | 185/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.8 (629.8) | 25.01 (635.3) | 0.22 (5.5) 0.9% |
| Width inches (mm) | 7.09 (180) | 7.28 (185) | 0.2 (5) 2.8% |
| Circum. inches (mm) | 77.9 (1978.58) | 78.58 (1995.85) | 0.68 (17.28) 0.9% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.01 (101.75) | 0.11 (2.75) 2.8% |
| Revolutions per mile (km) | 813.39 (505.41) | 806.34 (501.04) | -7.04 (-4.38) -0.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.17 mph (32.47 km/h) |
| 25 mph (40.23 km/h) | 25.22 mph (40.59 km/h) |
| 30 mph (48.28 km/h) | 30.26 mph (48.7 km/h) |
| 35 mph (56.33 km/h) | 35.31 mph (56.82 km/h) |
| 40 mph (64.37 km/h) | 40.35 mph (64.94 km/h) |
| 45 mph (72.42 km/h) | 45.39 mph (73.05 km/h) |
| 50 mph (80.47 km/h) | 50.44 mph (81.17 km/h) |
| 55 mph (88.51 km/h) | 55.48 mph (89.29 km/h) |
| 60 mph (96.56 km/h) | 60.52 mph (97.4 km/h) |
| 65 mph (104.61 km/h) | 65.57 mph (105.52 km/h) |
| 70 mph (112.65 km/h) | 70.61 mph (113.64 km/h) |
| 75 mph (120.7 km/h) | 75.65 mph (121.76 km/h) |
| 80 mph (128.75 km/h) | 80.7 mph (129.87 km/h) |
| 85 mph (136.79 km/h) | 85.74 mph (137.99 km/h) |
| 90 mph (144.84 km/h) | 90.79 mph (146.11 km/h) |
| 95 mph (152.89 km/h) | 95.83 mph (154.22 km/h) |
| 100 mph (160.93 km/h) | 100.87 mph (162.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2052 | 2384 | 2567 | 2681 | 2803 | 2890 | 2986 | 3100 | 3257 | 3414 | 3589 | 3729 | 3982 | 4261 | 4479 | 4619 | 4698 | 4986 | 5388 | 6261 |
Better Fuel Economy Factory Ratios Increased Power
