Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-18 | 215/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.97 (659.7) | 26.46 (672.2) | 0.49 (12.5) 1.9% |
| Width inches (mm) | 8.86 (225) | 8.46 (215) | -0.39 (-10) -4.4% |
| Circum. inches (mm) | 81.59 (2072.51) | 83.14 (2111.78) | 1.55 (39.27) 1.9% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.23 (107.5) | 0.25 (6.25) 6.2% |
| Revolutions per mile (km) | 776.52 (482.51) | 762.08 (473.53) | -14.44 (-8.97) -1.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.38 mph (32.8 km/h) |
| 25 mph (40.23 km/h) | 25.47 mph (41 km/h) |
| 30 mph (48.28 km/h) | 30.57 mph (49.2 km/h) |
| 35 mph (56.33 km/h) | 35.66 mph (57.39 km/h) |
| 40 mph (64.37 km/h) | 40.76 mph (65.59 km/h) |
| 45 mph (72.42 km/h) | 45.85 mph (73.79 km/h) |
| 50 mph (80.47 km/h) | 50.95 mph (81.99 km/h) |
| 55 mph (88.51 km/h) | 56.04 mph (90.19 km/h) |
| 60 mph (96.56 km/h) | 61.14 mph (98.39 km/h) |
| 65 mph (104.61 km/h) | 66.23 mph (106.59 km/h) |
| 70 mph (112.65 km/h) | 71.33 mph (114.79 km/h) |
| 75 mph (120.7 km/h) | 76.42 mph (122.99 km/h) |
| 80 mph (128.75 km/h) | 81.52 mph (131.19 km/h) |
| 85 mph (136.79 km/h) | 86.61 mph (139.39 km/h) |
| 90 mph (144.84 km/h) | 91.71 mph (147.59 km/h) |
| 95 mph (152.89 km/h) | 96.8 mph (155.78 km/h) |
| 100 mph (160.93 km/h) | 101.89 mph (163.98 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1939 | 2253 | 2426 | 2534 | 2649 | 2732 | 2822 | 2930 | 3078 | 3227 | 3392 | 3524 | 3763 | 4027 | 4234 | 4366 | 4440 | 4712 | 5092 | 5917 |
Better Fuel Economy Factory Ratios Increased Power
