Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/90-16 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.28 (667.4) | 27.31 (693.7) | 1.04 (26.3) 3.9% |
| Width inches (mm) | 5.71 (145) | 8.46 (215) | 2.76 (70) 48.3% |
| Circum. inches (mm) | 82.55 (2096.7) | 85.8 (2179.32) | 3.25 (82.62) 3.9% |
| Sidewall Height inches (mm) | 5.14 (130.5) | 4.66 (118.25) | -0.48 (-12.25) -9.4% |
| Revolutions per mile (km) | 767.56 (476.94) | 738.46 (458.86) | -29.1 (-18.08) -3.8% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.79 mph (33.46 km/h) |
| 25 mph (40.23 km/h) | 25.99 mph (41.82 km/h) |
| 30 mph (48.28 km/h) | 31.18 mph (50.18 km/h) |
| 35 mph (56.33 km/h) | 36.38 mph (58.55 km/h) |
| 40 mph (64.37 km/h) | 41.58 mph (66.91 km/h) |
| 45 mph (72.42 km/h) | 46.77 mph (75.27 km/h) |
| 50 mph (80.47 km/h) | 51.97 mph (83.64 km/h) |
| 55 mph (88.51 km/h) | 57.17 mph (92 km/h) |
| 60 mph (96.56 km/h) | 62.36 mph (100.37 km/h) |
| 65 mph (104.61 km/h) | 67.56 mph (108.73 km/h) |
| 70 mph (112.65 km/h) | 72.76 mph (117.09 km/h) |
| 75 mph (120.7 km/h) | 77.96 mph (125.46 km/h) |
| 80 mph (128.75 km/h) | 83.15 mph (133.82 km/h) |
| 85 mph (136.79 km/h) | 88.35 mph (142.19 km/h) |
| 90 mph (144.84 km/h) | 93.55 mph (150.55 km/h) |
| 95 mph (152.89 km/h) | 98.74 mph (158.91 km/h) |
| 100 mph (160.93 km/h) | 103.94 mph (167.28 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
