Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-18 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.62 (650.7) | 27.31 (693.7) | 1.69 (43) 6.6% |
| Width inches (mm) | 8.46 (215) | 8.46 (215) | 0 (0) 0% |
| Circum. inches (mm) | 80.48 (2044.23) | 85.8 (2179.32) | 5.32 (135.09) 6.6% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 4.66 (118.25) | 0.85 (21.5) 22.2% |
| Revolutions per mile (km) | 787.26 (489.18) | 738.46 (458.86) | -48.8 (-30.32) -6.2% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.32 mph (34.31 km/h) |
| 25 mph (40.23 km/h) | 26.65 mph (42.89 km/h) |
| 30 mph (48.28 km/h) | 31.98 mph (51.47 km/h) |
| 35 mph (56.33 km/h) | 37.31 mph (60.05 km/h) |
| 40 mph (64.37 km/h) | 42.64 mph (68.63 km/h) |
| 45 mph (72.42 km/h) | 47.97 mph (77.21 km/h) |
| 50 mph (80.47 km/h) | 53.3 mph (85.78 km/h) |
| 55 mph (88.51 km/h) | 58.63 mph (94.36 km/h) |
| 60 mph (96.56 km/h) | 63.96 mph (102.94 km/h) |
| 65 mph (104.61 km/h) | 69.3 mph (111.52 km/h) |
| 70 mph (112.65 km/h) | 74.63 mph (120.1 km/h) |
| 75 mph (120.7 km/h) | 79.96 mph (128.68 km/h) |
| 80 mph (128.75 km/h) | 85.29 mph (137.26 km/h) |
| 85 mph (136.79 km/h) | 90.62 mph (145.83 km/h) |
| 90 mph (144.84 km/h) | 95.95 mph (154.41 km/h) |
| 95 mph (152.89 km/h) | 101.28 mph (162.99 km/h) |
| 100 mph (160.93 km/h) | 106.61 mph (171.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1879 | 2183 | 2351 | 2455 | 2567 | 2647 | 2735 | 2839 | 2983 | 3127 | 3287 | 3415 | 3647 | 3902 | 4102 | 4230 | 4302 | 4566 | 4934 | 5734 |
Better Fuel Economy Factory Ratios Increased Power
