Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/35-19 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.48 (647.1) | 25.97 (659.7) | 0.5 (12.6) 1.9% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 80.04 (2032.92) | 81.59 (2072.51) | 1.56 (39.58) 1.9% |
| Sidewall Height inches (mm) | 3.24 (82.25) | 3.99 (101.25) | 0.75 (19) 23.1% |
| Revolutions per mile (km) | 791.64 (491.9) | 776.52 (482.51) | -15.12 (-9.4) -1.9% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.39 mph (32.81 km/h) |
| 25 mph (40.23 km/h) | 25.49 mph (41.02 km/h) |
| 30 mph (48.28 km/h) | 30.58 mph (49.22 km/h) |
| 35 mph (56.33 km/h) | 35.68 mph (57.42 km/h) |
| 40 mph (64.37 km/h) | 40.78 mph (65.63 km/h) |
| 45 mph (72.42 km/h) | 45.88 mph (73.83 km/h) |
| 50 mph (80.47 km/h) | 50.97 mph (82.03 km/h) |
| 55 mph (88.51 km/h) | 56.07 mph (90.24 km/h) |
| 60 mph (96.56 km/h) | 61.17 mph (98.44 km/h) |
| 65 mph (104.61 km/h) | 66.27 mph (106.64 km/h) |
| 70 mph (112.65 km/h) | 71.36 mph (114.85 km/h) |
| 75 mph (120.7 km/h) | 76.46 mph (123.05 km/h) |
| 80 mph (128.75 km/h) | 81.56 mph (131.25 km/h) |
| 85 mph (136.79 km/h) | 86.66 mph (139.46 km/h) |
| 90 mph (144.84 km/h) | 91.75 mph (147.66 km/h) |
| 95 mph (152.89 km/h) | 96.85 mph (155.86 km/h) |
| 100 mph (160.93 km/h) | 101.95 mph (164.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 | 2296 | 2472 | 2582 | 2699 | 2783 | 2876 | 2985 | 3137 | 3288 | 3456 | 3591 | 3834 | 4104 | 4314 | 4448 | 4524 | 4801 | 5188 | 6029 |
Better Fuel Economy Factory Ratios Increased Power
