Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/55-17 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.31 (668.3) | 26.86 (682.2) | 0.55 (13.9) 2.1% |
| Width inches (mm) | 8.46 (215) | 8.86 (225) | 0.39 (10) 4.7% |
| Circum. inches (mm) | 82.66 (2099.53) | 84.38 (2143.19) | 1.72 (43.67) 2.1% |
| Sidewall Height inches (mm) | 4.66 (118.25) | 4.43 (112.5) | -0.23 (-5.75) -4.9% |
| Revolutions per mile (km) | 766.53 (476.3) | 750.91 (466.59) | -15.62 (-9.7) -2% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.86 km/h) |
| 25 mph (40.23 km/h) | 25.52 mph (41.07 km/h) |
| 30 mph (48.28 km/h) | 30.62 mph (49.28 km/h) |
| 35 mph (56.33 km/h) | 35.73 mph (57.5 km/h) |
| 40 mph (64.37 km/h) | 40.83 mph (65.71 km/h) |
| 45 mph (72.42 km/h) | 45.94 mph (73.93 km/h) |
| 50 mph (80.47 km/h) | 51.04 mph (82.14 km/h) |
| 55 mph (88.51 km/h) | 56.14 mph (90.36 km/h) |
| 60 mph (96.56 km/h) | 61.25 mph (98.57 km/h) |
| 65 mph (104.61 km/h) | 66.35 mph (106.78 km/h) |
| 70 mph (112.65 km/h) | 71.46 mph (115 km/h) |
| 75 mph (120.7 km/h) | 76.56 mph (123.21 km/h) |
| 80 mph (128.75 km/h) | 81.66 mph (131.43 km/h) |
| 85 mph (136.79 km/h) | 86.77 mph (139.64 km/h) |
| 90 mph (144.84 km/h) | 91.87 mph (147.85 km/h) |
| 95 mph (152.89 km/h) | 96.98 mph (156.07 km/h) |
| 100 mph (160.93 km/h) | 102.08 mph (164.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
