Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.62 (650.7) | 26.86 (682.2) | 1.24 (31.5) 4.8% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 80.48 (2044.23) | 84.38 (2143.19) | 3.9 (98.96) 4.8% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 4.43 (112.5) | 0.62 (15.75) 16.3% |
| Revolutions per mile (km) | 787.26 (489.18) | 750.91 (466.59) | -36.35 (-22.59) -4.6% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.97 mph (33.75 km/h) |
| 25 mph (40.23 km/h) | 26.21 mph (42.18 km/h) |
| 30 mph (48.28 km/h) | 31.45 mph (50.62 km/h) |
| 35 mph (56.33 km/h) | 36.69 mph (59.05 km/h) |
| 40 mph (64.37 km/h) | 41.94 mph (67.49 km/h) |
| 45 mph (72.42 km/h) | 47.18 mph (75.93 km/h) |
| 50 mph (80.47 km/h) | 52.42 mph (84.36 km/h) |
| 55 mph (88.51 km/h) | 57.66 mph (92.8 km/h) |
| 60 mph (96.56 km/h) | 62.9 mph (101.24 km/h) |
| 65 mph (104.61 km/h) | 68.15 mph (109.67 km/h) |
| 70 mph (112.65 km/h) | 73.39 mph (118.11 km/h) |
| 75 mph (120.7 km/h) | 78.63 mph (126.54 km/h) |
| 80 mph (128.75 km/h) | 83.87 mph (134.98 km/h) |
| 85 mph (136.79 km/h) | 89.11 mph (143.42 km/h) |
| 90 mph (144.84 km/h) | 94.36 mph (151.85 km/h) |
| 95 mph (152.89 km/h) | 99.6 mph (160.29 km/h) |
| 100 mph (160.93 km/h) | 104.84 mph (168.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | 2220 | 2391 | 2496 | 2610 | 2692 | 2781 | 2887 | 3033 | 3179 | 3342 | 3472 | 3708 | 3968 | 4171 | 4302 | 4375 | 4643 | 5017 | 5830 |
Better Fuel Economy Factory Ratios Increased Power
