Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-19 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.72 (678.6) | 25.09 (637.2) | -1.63 (-41.4) -6.1% |
| Width inches (mm) | 9.65 (245) | 8.86 (225) | -0.79 (-20) -8.2% |
| Circum. inches (mm) | 83.93 (2131.88) | 78.81 (2001.82) | -5.12 (-130.06) -6.1% |
| Sidewall Height inches (mm) | 3.86 (98) | 3.54 (90) | -0.31 (-8) -8.2% |
| Revolutions per mile (km) | 754.89 (469.07) | 803.94 (499.54) | 49.05 (30.48) 6.5% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.22 km/h) |
| 25 mph (40.23 km/h) | 23.47 mph (37.78 km/h) |
| 30 mph (48.28 km/h) | 28.17 mph (45.33 km/h) |
| 35 mph (56.33 km/h) | 32.86 mph (52.89 km/h) |
| 40 mph (64.37 km/h) | 37.56 mph (60.45 km/h) |
| 45 mph (72.42 km/h) | 42.25 mph (68 km/h) |
| 50 mph (80.47 km/h) | 46.95 mph (75.56 km/h) |
| 55 mph (88.51 km/h) | 51.64 mph (83.11 km/h) |
| 60 mph (96.56 km/h) | 56.34 mph (90.67 km/h) |
| 65 mph (104.61 km/h) | 61.03 mph (98.23 km/h) |
| 70 mph (112.65 km/h) | 65.73 mph (105.78 km/h) |
| 75 mph (120.7 km/h) | 70.42 mph (113.34 km/h) |
| 80 mph (128.75 km/h) | 75.12 mph (120.89 km/h) |
| 85 mph (136.79 km/h) | 79.81 mph (128.45 km/h) |
| 90 mph (144.84 km/h) | 84.51 mph (136 km/h) |
| 95 mph (152.89 km/h) | 89.2 mph (143.56 km/h) |
| 100 mph (160.93 km/h) | 93.9 mph (151.12 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
