Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-10 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 17.09 (434) | 25.09 (637.2) | 8 (203.2) 46.8% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 53.68 (1363.45) | 78.81 (2001.82) | 25.13 (638.37) 46.8% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.54 (90) | 0 (0) 0% |
| Revolutions per mile (km) | 1180.35 (733.43) | 803.94 (499.54) | -376.41 (-233.89) -31.9% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.36 mph (47.26 km/h) |
| 25 mph (40.23 km/h) | 36.71 mph (59.07 km/h) |
| 30 mph (48.28 km/h) | 44.05 mph (70.89 km/h) |
| 35 mph (56.33 km/h) | 51.39 mph (82.7 km/h) |
| 40 mph (64.37 km/h) | 58.73 mph (94.51 km/h) |
| 45 mph (72.42 km/h) | 66.07 mph (106.33 km/h) |
| 50 mph (80.47 km/h) | 73.41 mph (118.14 km/h) |
| 55 mph (88.51 km/h) | 80.75 mph (129.96 km/h) |
| 60 mph (96.56 km/h) | 88.09 mph (141.77 km/h) |
| 65 mph (104.61 km/h) | 95.43 mph (153.59 km/h) |
| 70 mph (112.65 km/h) | 102.77 mph (165.4 km/h) |
| 75 mph (120.7 km/h) | 110.12 mph (177.21 km/h) |
| 80 mph (128.75 km/h) | 117.46 mph (189.03 km/h) |
| 85 mph (136.79 km/h) | 124.8 mph (200.84 km/h) |
| 90 mph (144.84 km/h) | 132.14 mph (212.66 km/h) |
| 95 mph (152.89 km/h) | 139.48 mph (224.47 km/h) |
| 100 mph (160.93 km/h) | 146.82 mph (236.28 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
