Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/55-18 | 225/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.01 (660.7) | 24.97 (634.3) | -1.04 (-26.4) -4% |
| Width inches (mm) | 7.28 (185) | 8.86 (225) | 1.57 (40) 21.6% |
| Circum. inches (mm) | 81.72 (2075.65) | 78.45 (1992.71) | -3.27 (-82.94) -4% |
| Sidewall Height inches (mm) | 4.01 (101.75) | 3.99 (101.25) | -0.02 (-0.5) -0.5% |
| Revolutions per mile (km) | 775.34 (481.78) | 807.61 (501.83) | 32.27 (20.05) 4.2% |
225/45-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.2 mph (30.9 km/h) |
| 25 mph (40.23 km/h) | 24 mph (38.63 km/h) |
| 30 mph (48.28 km/h) | 28.8 mph (46.35 km/h) |
| 35 mph (56.33 km/h) | 33.6 mph (54.08 km/h) |
| 40 mph (64.37 km/h) | 38.4 mph (61.8 km/h) |
| 45 mph (72.42 km/h) | 43.2 mph (69.53 km/h) |
| 50 mph (80.47 km/h) | 48 mph (77.25 km/h) |
| 55 mph (88.51 km/h) | 52.8 mph (84.98 km/h) |
| 60 mph (96.56 km/h) | 57.6 mph (92.7 km/h) |
| 65 mph (104.61 km/h) | 62.4 mph (100.43 km/h) |
| 70 mph (112.65 km/h) | 67.2 mph (108.15 km/h) |
| 75 mph (120.7 km/h) | 72 mph (115.88 km/h) |
| 80 mph (128.75 km/h) | 76.8 mph (123.6 km/h) |
| 85 mph (136.79 km/h) | 81.6 mph (131.33 km/h) |
| 90 mph (144.84 km/h) | 86.4 mph (139.05 km/h) |
| 95 mph (152.89 km/h) | 91.2 mph (146.78 km/h) |
| 100 mph (160.93 km/h) | 96 mph (154.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2055 | 2388 | 2571 | 2685 | 2807 | 2895 | 2991 | 3105 | 3262 | 3420 | 3594 | 3734 | 3988 | 4268 | 4487 | 4626 | 4705 | 4994 | 5396 | 6271 |
Better Fuel Economy Factory Ratios Increased Power
