Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-18 | 215/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.89 (632.2) | 27.31 (693.7) | 2.42 (61.5) 9.7% |
| Width inches (mm) | 4.92 (125) | 8.46 (215) | 3.54 (90) 72% |
| Circum. inches (mm) | 78.19 (1986.11) | 85.8 (2179.32) | 7.61 (193.21) 9.7% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 4.66 (118.25) | 1.21 (30.75) 35.1% |
| Revolutions per mile (km) | 810.3 (503.49) | 738.46 (458.86) | -71.84 (-44.64) -8.9% |
215/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.95 mph (35.32 km/h) |
| 25 mph (40.23 km/h) | 27.43 mph (44.15 km/h) |
| 30 mph (48.28 km/h) | 32.92 mph (52.98 km/h) |
| 35 mph (56.33 km/h) | 38.4 mph (61.81 km/h) |
| 40 mph (64.37 km/h) | 43.89 mph (70.64 km/h) |
| 45 mph (72.42 km/h) | 49.38 mph (79.47 km/h) |
| 50 mph (80.47 km/h) | 54.86 mph (88.3 km/h) |
| 55 mph (88.51 km/h) | 60.35 mph (97.12 km/h) |
| 60 mph (96.56 km/h) | 65.84 mph (105.95 km/h) |
| 65 mph (104.61 km/h) | 71.32 mph (114.78 km/h) |
| 70 mph (112.65 km/h) | 76.81 mph (123.61 km/h) |
| 75 mph (120.7 km/h) | 82.3 mph (132.44 km/h) |
| 80 mph (128.75 km/h) | 87.78 mph (141.27 km/h) |
| 85 mph (136.79 km/h) | 93.27 mph (150.1 km/h) |
| 90 mph (144.84 km/h) | 98.76 mph (158.93 km/h) |
| 95 mph (152.89 km/h) | 104.24 mph (167.76 km/h) |
| 100 mph (160.93 km/h) | 109.73 mph (176.59 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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