Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-17 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.62 (625.3) | 23.01 (584.5) | -1.61 (-40.8) -6.5% |
| Width inches (mm) | 8.46 (215) | 7.28 (185) | -1.18 (-30) -14% |
| Circum. inches (mm) | 77.34 (1964.44) | 72.29 (1836.26) | -5.05 (-128.18) -6.5% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 4.01 (101.75) | 0.2 (5) 5.2% |
| Revolutions per mile (km) | 819.24 (509.05) | 876.42 (544.58) | 57.19 (35.53) 7% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.7 mph (30.09 km/h) |
| 25 mph (40.23 km/h) | 23.37 mph (37.61 km/h) |
| 30 mph (48.28 km/h) | 28.04 mph (45.13 km/h) |
| 35 mph (56.33 km/h) | 32.72 mph (52.65 km/h) |
| 40 mph (64.37 km/h) | 37.39 mph (60.17 km/h) |
| 45 mph (72.42 km/h) | 42.06 mph (67.7 km/h) |
| 50 mph (80.47 km/h) | 46.74 mph (75.22 km/h) |
| 55 mph (88.51 km/h) | 51.41 mph (82.74 km/h) |
| 60 mph (96.56 km/h) | 56.09 mph (90.26 km/h) |
| 65 mph (104.61 km/h) | 60.76 mph (97.78 km/h) |
| 70 mph (112.65 km/h) | 65.43 mph (105.3 km/h) |
| 75 mph (120.7 km/h) | 70.11 mph (112.83 km/h) |
| 80 mph (128.75 km/h) | 74.78 mph (120.35 km/h) |
| 85 mph (136.79 km/h) | 79.45 mph (127.87 km/h) |
| 90 mph (144.84 km/h) | 84.13 mph (135.39 km/h) |
| 95 mph (152.89 km/h) | 88.8 mph (142.91 km/h) |
| 100 mph (160.93 km/h) | 93.48 mph (150.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2230 | 2591 | 2790 | 2914 | 3047 | 3141 | 3246 | 3369 | 3540 | 3711 | 3901 | 4053 | 4328 | 4631 | 4869 | 5021 | 5106 | 5419 | 5856 | 6805 |
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