Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/55-18 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.01 (660.7) | 27.31 (693.7) | 1.3 (33) 5% |
| Width inches (mm) | 7.28 (185) | 8.46 (215) | 1.18 (30) 16.2% |
| Circum. inches (mm) | 81.72 (2075.65) | 85.8 (2179.32) | 4.08 (103.67) 5% |
| Sidewall Height inches (mm) | 4.01 (101.75) | 4.66 (118.25) | 0.65 (16.5) 16.2% |
| Revolutions per mile (km) | 775.34 (481.78) | 738.46 (458.86) | -36.88 (-22.92) -4.8% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21 mph (33.79 km/h) |
| 25 mph (40.23 km/h) | 26.25 mph (42.24 km/h) |
| 30 mph (48.28 km/h) | 31.5 mph (50.69 km/h) |
| 35 mph (56.33 km/h) | 36.75 mph (59.14 km/h) |
| 40 mph (64.37 km/h) | 42 mph (67.59 km/h) |
| 45 mph (72.42 km/h) | 47.25 mph (76.04 km/h) |
| 50 mph (80.47 km/h) | 52.5 mph (84.49 km/h) |
| 55 mph (88.51 km/h) | 57.75 mph (92.94 km/h) |
| 60 mph (96.56 km/h) | 63 mph (101.38 km/h) |
| 65 mph (104.61 km/h) | 68.25 mph (109.83 km/h) |
| 70 mph (112.65 km/h) | 73.5 mph (118.28 km/h) |
| 75 mph (120.7 km/h) | 78.75 mph (126.73 km/h) |
| 80 mph (128.75 km/h) | 84 mph (135.18 km/h) |
| 85 mph (136.79 km/h) | 89.25 mph (143.63 km/h) |
| 90 mph (144.84 km/h) | 94.5 mph (152.08 km/h) |
| 95 mph (152.89 km/h) | 99.74 mph (160.52 km/h) |
| 100 mph (160.93 km/h) | 104.99 mph (168.97 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 |
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