Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 27.31 (693.7) | 0.46 (11.7) 1.7% |
| Width inches (mm) | 5.71 (145) | 8.46 (215) | 2.76 (70) 48.3% |
| Circum. inches (mm) | 84.35 (2142.57) | 85.8 (2179.32) | 1.45 (36.76) 1.7% |
| Sidewall Height inches (mm) | 3.43 (87) | 4.66 (118.25) | 1.23 (31.25) 35.9% |
| Revolutions per mile (km) | 751.13 (466.73) | 738.46 (458.86) | -12.67 (-7.87) -1.7% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.34 mph (32.74 km/h) |
| 25 mph (40.23 km/h) | 25.43 mph (40.92 km/h) |
| 30 mph (48.28 km/h) | 30.51 mph (49.11 km/h) |
| 35 mph (56.33 km/h) | 35.6 mph (57.29 km/h) |
| 40 mph (64.37 km/h) | 40.69 mph (65.48 km/h) |
| 45 mph (72.42 km/h) | 45.77 mph (73.66 km/h) |
| 50 mph (80.47 km/h) | 50.86 mph (81.85 km/h) |
| 55 mph (88.51 km/h) | 55.94 mph (90.03 km/h) |
| 60 mph (96.56 km/h) | 61.03 mph (98.22 km/h) |
| 65 mph (104.61 km/h) | 66.12 mph (106.4 km/h) |
| 70 mph (112.65 km/h) | 71.2 mph (114.59 km/h) |
| 75 mph (120.7 km/h) | 76.29 mph (122.77 km/h) |
| 80 mph (128.75 km/h) | 81.37 mph (130.96 km/h) |
| 85 mph (136.79 km/h) | 86.46 mph (139.14 km/h) |
| 90 mph (144.84 km/h) | 91.54 mph (147.33 km/h) |
| 95 mph (152.89 km/h) | 96.63 mph (155.51 km/h) |
| 100 mph (160.93 km/h) | 101.72 mph (163.7 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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