Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-19 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.54 (699.6) | 27.31 (693.7) | -0.23 (-5.9) -0.8% |
| Width inches (mm) | 6.1 (155) | 8.46 (215) | 2.36 (60) 38.7% |
| Circum. inches (mm) | 86.53 (2197.86) | 85.8 (2179.32) | -0.73 (-18.54) -0.8% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.66 (118.25) | 0.38 (9.75) 9% |
| Revolutions per mile (km) | 732.23 (454.99) | 738.46 (458.86) | 6.23 (3.87) 0.9% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.83 mph (31.92 km/h) |
| 25 mph (40.23 km/h) | 24.79 mph (39.89 km/h) |
| 30 mph (48.28 km/h) | 29.75 mph (47.87 km/h) |
| 35 mph (56.33 km/h) | 34.7 mph (55.85 km/h) |
| 40 mph (64.37 km/h) | 39.66 mph (63.83 km/h) |
| 45 mph (72.42 km/h) | 44.62 mph (71.81 km/h) |
| 50 mph (80.47 km/h) | 49.58 mph (79.79 km/h) |
| 55 mph (88.51 km/h) | 54.54 mph (87.77 km/h) |
| 60 mph (96.56 km/h) | 59.49 mph (95.75 km/h) |
| 65 mph (104.61 km/h) | 64.45 mph (103.73 km/h) |
| 70 mph (112.65 km/h) | 69.41 mph (111.7 km/h) |
| 75 mph (120.7 km/h) | 74.37 mph (119.68 km/h) |
| 80 mph (128.75 km/h) | 79.33 mph (127.66 km/h) |
| 85 mph (136.79 km/h) | 84.28 mph (135.64 km/h) |
| 90 mph (144.84 km/h) | 89.24 mph (143.62 km/h) |
| 95 mph (152.89 km/h) | 94.2 mph (151.6 km/h) |
| 100 mph (160.93 km/h) | 99.16 mph (159.58 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
