Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 180/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 24.8 (629.8) | 0.43 (11) 1.8% |
| Width inches (mm) | 6.69 (170) | 7.09 (180) | 0.39 (10) 5.9% |
| Circum. inches (mm) | 76.54 (1944.02) | 77.9 (1978.58) | 1.36 (34.56) 1.8% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 3.9 (99) | 0.22 (5.5) 5.9% |
| Revolutions per mile (km) | 827.84 (514.4) | 813.39 (505.41) | -14.46 (-8.98) -1.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.36 mph (32.76 km/h) |
| 25 mph (40.23 km/h) | 25.44 mph (40.95 km/h) |
| 30 mph (48.28 km/h) | 30.53 mph (49.14 km/h) |
| 35 mph (56.33 km/h) | 35.62 mph (57.33 km/h) |
| 40 mph (64.37 km/h) | 40.71 mph (65.52 km/h) |
| 45 mph (72.42 km/h) | 45.8 mph (73.71 km/h) |
| 50 mph (80.47 km/h) | 50.89 mph (81.9 km/h) |
| 55 mph (88.51 km/h) | 55.98 mph (90.09 km/h) |
| 60 mph (96.56 km/h) | 61.07 mph (98.28 km/h) |
| 65 mph (104.61 km/h) | 66.16 mph (106.47 km/h) |
| 70 mph (112.65 km/h) | 71.24 mph (114.66 km/h) |
| 75 mph (120.7 km/h) | 76.33 mph (122.85 km/h) |
| 80 mph (128.75 km/h) | 81.42 mph (131.04 km/h) |
| 85 mph (136.79 km/h) | 86.51 mph (139.23 km/h) |
| 90 mph (144.84 km/h) | 91.6 mph (147.42 km/h) |
| 95 mph (152.89 km/h) | 96.69 mph (155.61 km/h) |
| 100 mph (160.93 km/h) | 101.78 mph (163.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2070 | 2405 | 2590 | 2704 | 2827 | 2915 | 3012 | 3127 | 3285 | 3444 | 3620 | 3761 | 4017 | 4298 | 4519 | 4660 | 4739 | 5029 | 5435 | 6315 |
Better Fuel Economy Factory Ratios Increased Power
