Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 27.31 (693.7) | 1.99 (50.5) 7.9% |
| Width inches (mm) | 6.1 (155) | 8.46 (215) | 2.36 (60) 38.7% |
| Circum. inches (mm) | 79.55 (2020.67) | 85.8 (2179.32) | 6.25 (158.65) 7.9% |
| Sidewall Height inches (mm) | 3.66 (93) | 4.66 (118.25) | 0.99 (25.25) 27.2% |
| Revolutions per mile (km) | 796.44 (494.88) | 738.46 (458.86) | -57.98 (-36.03) -7.3% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.57 mph (34.71 km/h) |
| 25 mph (40.23 km/h) | 26.96 mph (43.39 km/h) |
| 30 mph (48.28 km/h) | 32.36 mph (52.07 km/h) |
| 35 mph (56.33 km/h) | 37.75 mph (60.75 km/h) |
| 40 mph (64.37 km/h) | 43.14 mph (69.43 km/h) |
| 45 mph (72.42 km/h) | 48.53 mph (78.11 km/h) |
| 50 mph (80.47 km/h) | 53.93 mph (86.79 km/h) |
| 55 mph (88.51 km/h) | 59.32 mph (95.46 km/h) |
| 60 mph (96.56 km/h) | 64.71 mph (104.14 km/h) |
| 65 mph (104.61 km/h) | 70.1 mph (112.82 km/h) |
| 70 mph (112.65 km/h) | 75.5 mph (121.5 km/h) |
| 75 mph (120.7 km/h) | 80.89 mph (130.18 km/h) |
| 80 mph (128.75 km/h) | 86.28 mph (138.86 km/h) |
| 85 mph (136.79 km/h) | 91.67 mph (147.53 km/h) |
| 90 mph (144.84 km/h) | 97.07 mph (156.21 km/h) |
| 95 mph (152.89 km/h) | 102.46 mph (164.89 km/h) |
| 100 mph (160.93 km/h) | 107.85 mph (173.57 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
