Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-17 | 180/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 24.8 (629.8) | -0.71 (-18) -2.8% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 80.12 (2035.12) | 77.9 (1978.58) | -2.23 (-56.55) -2.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.9 (99) | -0.35 (-9) -8.3% |
| Revolutions per mile (km) | 790.78 (491.37) | 813.39 (505.41) | 22.6 (14.04) 2.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.44 mph (31.29 km/h) |
| 25 mph (40.23 km/h) | 24.31 mph (39.12 km/h) |
| 30 mph (48.28 km/h) | 29.17 mph (46.94 km/h) |
| 35 mph (56.33 km/h) | 34.03 mph (54.76 km/h) |
| 40 mph (64.37 km/h) | 38.89 mph (62.59 km/h) |
| 45 mph (72.42 km/h) | 43.75 mph (70.41 km/h) |
| 50 mph (80.47 km/h) | 48.61 mph (78.23 km/h) |
| 55 mph (88.51 km/h) | 53.47 mph (86.05 km/h) |
| 60 mph (96.56 km/h) | 58.33 mph (93.88 km/h) |
| 65 mph (104.61 km/h) | 63.19 mph (101.7 km/h) |
| 70 mph (112.65 km/h) | 68.05 mph (109.52 km/h) |
| 75 mph (120.7 km/h) | 72.92 mph (117.35 km/h) |
| 80 mph (128.75 km/h) | 77.78 mph (125.17 km/h) |
| 85 mph (136.79 km/h) | 82.64 mph (132.99 km/h) |
| 90 mph (144.84 km/h) | 87.5 mph (140.82 km/h) |
| 95 mph (152.89 km/h) | 92.36 mph (148.64 km/h) |
| 100 mph (160.93 km/h) | 97.22 mph (156.46 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
