Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/60-17 | 180/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.03 (635.8) | 24.8 (629.8) | -0.24 (-6) -0.9% |
| Width inches (mm) | 6.69 (170) | 7.09 (180) | 0.39 (10) 5.9% |
| Circum. inches (mm) | 78.64 (1997.42) | 77.9 (1978.58) | -0.74 (-18.85) -0.9% |
| Sidewall Height inches (mm) | 4.02 (102) | 3.9 (99) | -0.12 (-3) -2.9% |
| Revolutions per mile (km) | 805.71 (500.64) | 813.39 (505.41) | 7.68 (4.77) 1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.81 mph (31.88 km/h) |
| 25 mph (40.23 km/h) | 24.76 mph (39.85 km/h) |
| 30 mph (48.28 km/h) | 29.72 mph (47.82 km/h) |
| 35 mph (56.33 km/h) | 34.67 mph (55.8 km/h) |
| 40 mph (64.37 km/h) | 39.62 mph (63.77 km/h) |
| 45 mph (72.42 km/h) | 44.58 mph (71.74 km/h) |
| 50 mph (80.47 km/h) | 49.53 mph (79.71 km/h) |
| 55 mph (88.51 km/h) | 54.48 mph (87.68 km/h) |
| 60 mph (96.56 km/h) | 59.43 mph (95.65 km/h) |
| 65 mph (104.61 km/h) | 64.39 mph (103.62 km/h) |
| 70 mph (112.65 km/h) | 69.34 mph (111.59 km/h) |
| 75 mph (120.7 km/h) | 74.29 mph (119.56 km/h) |
| 80 mph (128.75 km/h) | 79.25 mph (127.53 km/h) |
| 85 mph (136.79 km/h) | 84.2 mph (135.5 km/h) |
| 90 mph (144.84 km/h) | 89.15 mph (143.47 km/h) |
| 95 mph (152.89 km/h) | 94.1 mph (151.45 km/h) |
| 100 mph (160.93 km/h) | 99.06 mph (159.42 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
