Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/40-18 | 215/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.77 (629.2) | 26.46 (672.2) | 1.69 (43) 6.8% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 77.82 (1976.69) | 83.14 (2111.78) | 5.32 (135.09) 6.8% |
| Sidewall Height inches (mm) | 3.39 (86) | 4.23 (107.5) | 0.85 (21.5) 25% |
| Revolutions per mile (km) | 814.16 (505.9) | 762.08 (473.53) | -52.08 (-32.36) -6.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.37 mph (34.39 km/h) |
| 25 mph (40.23 km/h) | 26.71 mph (42.98 km/h) |
| 30 mph (48.28 km/h) | 32.05 mph (51.58 km/h) |
| 35 mph (56.33 km/h) | 37.39 mph (60.18 km/h) |
| 40 mph (64.37 km/h) | 42.73 mph (68.77 km/h) |
| 45 mph (72.42 km/h) | 48.08 mph (77.37 km/h) |
| 50 mph (80.47 km/h) | 53.42 mph (85.97 km/h) |
| 55 mph (88.51 km/h) | 58.76 mph (94.56 km/h) |
| 60 mph (96.56 km/h) | 64.1 mph (103.16 km/h) |
| 65 mph (104.61 km/h) | 69.44 mph (111.76 km/h) |
| 70 mph (112.65 km/h) | 74.78 mph (120.35 km/h) |
| 75 mph (120.7 km/h) | 80.13 mph (128.95 km/h) |
| 80 mph (128.75 km/h) | 85.47 mph (137.55 km/h) |
| 85 mph (136.79 km/h) | 90.81 mph (146.14 km/h) |
| 90 mph (144.84 km/h) | 96.15 mph (154.74 km/h) |
| 95 mph (152.89 km/h) | 101.49 mph (163.34 km/h) |
| 100 mph (160.93 km/h) | 106.83 mph (171.93 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
