Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-17 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.62 (625.3) | 25.09 (637.2) | 0.47 (11.9) 1.9% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 77.34 (1964.44) | 78.81 (2001.82) | 1.47 (37.38) 1.9% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 3.54 (90) | -0.27 (-6.75) -7% |
| Revolutions per mile (km) | 819.24 (509.05) | 803.94 (499.54) | -15.3 (-9.51) -1.9% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.38 mph (32.8 km/h) |
| 25 mph (40.23 km/h) | 25.48 mph (41 km/h) |
| 30 mph (48.28 km/h) | 30.57 mph (49.2 km/h) |
| 35 mph (56.33 km/h) | 35.67 mph (57.4 km/h) |
| 40 mph (64.37 km/h) | 40.76 mph (65.6 km/h) |
| 45 mph (72.42 km/h) | 45.86 mph (73.8 km/h) |
| 50 mph (80.47 km/h) | 50.95 mph (82 km/h) |
| 55 mph (88.51 km/h) | 56.05 mph (90.2 km/h) |
| 60 mph (96.56 km/h) | 61.14 mph (98.4 km/h) |
| 65 mph (104.61 km/h) | 66.24 mph (106.6 km/h) |
| 70 mph (112.65 km/h) | 71.33 mph (114.8 km/h) |
| 75 mph (120.7 km/h) | 76.43 mph (123 km/h) |
| 80 mph (128.75 km/h) | 81.52 mph (131.2 km/h) |
| 85 mph (136.79 km/h) | 86.62 mph (139.4 km/h) |
| 90 mph (144.84 km/h) | 91.71 mph (147.6 km/h) |
| 95 mph (152.89 km/h) | 96.81 mph (155.8 km/h) |
| 100 mph (160.93 km/h) | 101.9 mph (164 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
