Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/50-17 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.28 (616.8) | 23.01 (584.5) | -1.27 (-32.3) -5.2% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 76.29 (1937.73) | 72.29 (1836.26) | -4 (-101.47) -5.2% |
| Sidewall Height inches (mm) | 3.64 (92.5) | 4.01 (101.75) | 0.36 (9.25) 10% |
| Revolutions per mile (km) | 830.53 (516.07) | 876.42 (544.58) | 45.9 (28.52) 5.5% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.95 mph (30.5 km/h) |
| 25 mph (40.23 km/h) | 23.69 mph (38.13 km/h) |
| 30 mph (48.28 km/h) | 28.43 mph (45.75 km/h) |
| 35 mph (56.33 km/h) | 33.17 mph (53.38 km/h) |
| 40 mph (64.37 km/h) | 37.91 mph (61 km/h) |
| 45 mph (72.42 km/h) | 42.64 mph (68.63 km/h) |
| 50 mph (80.47 km/h) | 47.38 mph (76.25 km/h) |
| 55 mph (88.51 km/h) | 52.12 mph (83.88 km/h) |
| 60 mph (96.56 km/h) | 56.86 mph (91.5 km/h) |
| 65 mph (104.61 km/h) | 61.6 mph (99.13 km/h) |
| 70 mph (112.65 km/h) | 66.33 mph (106.75 km/h) |
| 75 mph (120.7 km/h) | 71.07 mph (114.38 km/h) |
| 80 mph (128.75 km/h) | 75.81 mph (122.01 km/h) |
| 85 mph (136.79 km/h) | 80.55 mph (129.63 km/h) |
| 90 mph (144.84 km/h) | 85.29 mph (137.26 km/h) |
| 95 mph (152.89 km/h) | 90.03 mph (144.88 km/h) |
| 100 mph (160.93 km/h) | 94.76 mph (152.51 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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