Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-18 | 205/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 25.26 (641.7) | 0.18 (4.5) 0.7% |
| Width inches (mm) | 8.86 (225) | 8.07 (205) | -0.79 (-20) -8.9% |
| Circum. inches (mm) | 78.81 (2001.82) | 79.37 (2015.96) | 0.56 (14.14) 0.7% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.63 (92.25) | 0.09 (2.25) 2.5% |
| Revolutions per mile (km) | 803.94 (499.54) | 798.3 (496.04) | -5.64 (-3.5) -0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.14 mph (32.41 km/h) |
| 25 mph (40.23 km/h) | 25.18 mph (40.52 km/h) |
| 30 mph (48.28 km/h) | 30.21 mph (48.62 km/h) |
| 35 mph (56.33 km/h) | 35.25 mph (56.72 km/h) |
| 40 mph (64.37 km/h) | 40.28 mph (64.83 km/h) |
| 45 mph (72.42 km/h) | 45.32 mph (72.93 km/h) |
| 50 mph (80.47 km/h) | 50.35 mph (81.04 km/h) |
| 55 mph (88.51 km/h) | 55.39 mph (89.14 km/h) |
| 60 mph (96.56 km/h) | 60.42 mph (97.24 km/h) |
| 65 mph (104.61 km/h) | 65.46 mph (105.35 km/h) |
| 70 mph (112.65 km/h) | 70.49 mph (113.45 km/h) |
| 75 mph (120.7 km/h) | 75.53 mph (121.55 km/h) |
| 80 mph (128.75 km/h) | 80.56 mph (129.66 km/h) |
| 85 mph (136.79 km/h) | 85.6 mph (137.76 km/h) |
| 90 mph (144.84 km/h) | 90.64 mph (145.86 km/h) |
| 95 mph (152.89 km/h) | 95.67 mph (153.97 km/h) |
| 100 mph (160.93 km/h) | 100.71 mph (162.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2032 | 2360 | 2542 | 2654 | 2775 | 2861 | 2957 | 3069 | 3225 | 3380 | 3553 | 3691 | 3942 | 4219 | 4435 | 4573 | 4651 | 4936 | 5334 | 6198 |
Better Fuel Economy Factory Ratios Increased Power
