Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/40-18 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.46 (621.2) | 25.09 (637.2) | 0.63 (16) 2.6% |
| Width inches (mm) | 8.07 (205) | 8.86 (225) | 0.79 (20) 9.8% |
| Circum. inches (mm) | 76.83 (1951.56) | 78.81 (2001.82) | 1.98 (50.27) 2.6% |
| Sidewall Height inches (mm) | 3.23 (82) | 3.54 (90) | 0.31 (8) 9.8% |
| Revolutions per mile (km) | 824.65 (512.41) | 803.94 (499.54) | -20.71 (-12.87) -2.5% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.52 mph (33.02 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.27 km/h) |
| 30 mph (48.28 km/h) | 30.77 mph (49.52 km/h) |
| 35 mph (56.33 km/h) | 35.9 mph (57.78 km/h) |
| 40 mph (64.37 km/h) | 41.03 mph (66.03 km/h) |
| 45 mph (72.42 km/h) | 46.16 mph (74.29 km/h) |
| 50 mph (80.47 km/h) | 51.29 mph (82.54 km/h) |
| 55 mph (88.51 km/h) | 56.42 mph (90.79 km/h) |
| 60 mph (96.56 km/h) | 61.55 mph (99.05 km/h) |
| 65 mph (104.61 km/h) | 66.67 mph (107.3 km/h) |
| 70 mph (112.65 km/h) | 71.8 mph (115.56 km/h) |
| 75 mph (120.7 km/h) | 76.93 mph (123.81 km/h) |
| 80 mph (128.75 km/h) | 82.06 mph (132.06 km/h) |
| 85 mph (136.79 km/h) | 87.19 mph (140.32 km/h) |
| 90 mph (144.84 km/h) | 92.32 mph (148.57 km/h) |
| 95 mph (152.89 km/h) | 97.45 mph (156.83 km/h) |
| 100 mph (160.93 km/h) | 102.58 mph (165.08 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2046 | 2377 | 2560 | 2673 | 2795 | 2882 | 2977 | 3091 | 3247 | 3404 | 3578 | 3717 | 3970 | 4248 | 4466 | 4605 | 4684 | 4971 | 5372 | 6242 |
Better Fuel Economy Factory Ratios Increased Power
