Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-17 | 180/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.8 (629.8) | 26.92 (683.8) | 2.13 (54) 8.6% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 77.9 (1978.58) | 84.58 (2148.22) | 6.68 (169.65) 8.6% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.96 (126) | 1.06 (27) 27.3% |
| Revolutions per mile (km) | 813.39 (505.41) | 749.15 (465.5) | -64.23 (-39.91) -7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.71 mph (34.95 km/h) |
| 25 mph (40.23 km/h) | 27.14 mph (43.68 km/h) |
| 30 mph (48.28 km/h) | 32.57 mph (52.42 km/h) |
| 35 mph (56.33 km/h) | 38 mph (61.16 km/h) |
| 40 mph (64.37 km/h) | 43.43 mph (69.89 km/h) |
| 45 mph (72.42 km/h) | 48.86 mph (78.63 km/h) |
| 50 mph (80.47 km/h) | 54.29 mph (87.37 km/h) |
| 55 mph (88.51 km/h) | 59.72 mph (96.1 km/h) |
| 60 mph (96.56 km/h) | 65.14 mph (104.84 km/h) |
| 65 mph (104.61 km/h) | 70.57 mph (113.58 km/h) |
| 70 mph (112.65 km/h) | 76 mph (122.31 km/h) |
| 75 mph (120.7 km/h) | 81.43 mph (131.05 km/h) |
| 80 mph (128.75 km/h) | 86.86 mph (139.79 km/h) |
| 85 mph (136.79 km/h) | 92.29 mph (148.52 km/h) |
| 90 mph (144.84 km/h) | 97.72 mph (157.26 km/h) |
| 95 mph (152.89 km/h) | 103.15 mph (166 km/h) |
| 100 mph (160.93 km/h) | 108.57 mph (174.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1906 | 2215 | 2385 | 2491 | 2604 | 2685 | 2774 | 2880 | 3026 | 3172 | 3334 | 3464 | 3699 | 3959 | 4162 | 4292 | 4365 | 4632 | 5005 | 5817 |
Better Fuel Economy Factory Ratios Increased Power
