Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-17 | 185/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.58 (624.3) | 23.56 (598.3) | -1.02 (-26) -4.2% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 77.22 (1961.3) | 74 (1879.61) | -3.22 (-81.68) -4.2% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 3.28 (83.25) | -0.51 (-13) -13.5% |
| Revolutions per mile (km) | 820.55 (509.87) | 856.21 (532.02) | 35.66 (22.16) 4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.17 mph (30.85 km/h) |
| 25 mph (40.23 km/h) | 23.96 mph (38.56 km/h) |
| 30 mph (48.28 km/h) | 28.75 mph (46.27 km/h) |
| 35 mph (56.33 km/h) | 33.54 mph (53.98 km/h) |
| 40 mph (64.37 km/h) | 38.33 mph (61.69 km/h) |
| 45 mph (72.42 km/h) | 43.13 mph (69.4 km/h) |
| 50 mph (80.47 km/h) | 47.92 mph (77.12 km/h) |
| 55 mph (88.51 km/h) | 52.71 mph (84.83 km/h) |
| 60 mph (96.56 km/h) | 57.5 mph (92.54 km/h) |
| 65 mph (104.61 km/h) | 62.29 mph (100.25 km/h) |
| 70 mph (112.65 km/h) | 67.08 mph (107.96 km/h) |
| 75 mph (120.7 km/h) | 71.88 mph (115.67 km/h) |
| 80 mph (128.75 km/h) | 76.67 mph (123.39 km/h) |
| 85 mph (136.79 km/h) | 81.46 mph (131.1 km/h) |
| 90 mph (144.84 km/h) | 86.25 mph (138.81 km/h) |
| 95 mph (152.89 km/h) | 91.04 mph (146.52 km/h) |
| 100 mph (160.93 km/h) | 95.84 mph (154.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2179 | 2531 | 2726 | 2846 | 2976 | 3069 | 3171 | 3292 | 3458 | 3625 | 3811 | 3959 | 4228 | 4525 | 4756 | 4905 | 4988 | 5294 | 5721 | 6648 |
Better Fuel Economy Factory Ratios Increased Power
