Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/65-14 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.96 (583.1) | 23.01 (584.5) | 0.06 (1.4) 0.2% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 72.12 (1831.86) | 72.29 (1836.26) | 0.17 (4.4) 0.2% |
| Sidewall Height inches (mm) | 4.48 (113.75) | 4.01 (101.75) | -0.47 (-12) -10.5% |
| Revolutions per mile (km) | 878.53 (545.89) | 876.42 (544.58) | -2.1 (-1.31) -0.2% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.05 mph (32.26 km/h) |
| 25 mph (40.23 km/h) | 25.06 mph (40.33 km/h) |
| 30 mph (48.28 km/h) | 30.07 mph (48.4 km/h) |
| 35 mph (56.33 km/h) | 35.08 mph (56.46 km/h) |
| 40 mph (64.37 km/h) | 40.1 mph (64.53 km/h) |
| 45 mph (72.42 km/h) | 45.11 mph (72.59 km/h) |
| 50 mph (80.47 km/h) | 50.12 mph (80.66 km/h) |
| 55 mph (88.51 km/h) | 55.13 mph (88.73 km/h) |
| 60 mph (96.56 km/h) | 60.14 mph (96.79 km/h) |
| 65 mph (104.61 km/h) | 65.16 mph (104.86 km/h) |
| 70 mph (112.65 km/h) | 70.17 mph (112.92 km/h) |
| 75 mph (120.7 km/h) | 75.18 mph (120.99 km/h) |
| 80 mph (128.75 km/h) | 80.19 mph (129.06 km/h) |
| 85 mph (136.79 km/h) | 85.2 mph (137.12 km/h) |
| 90 mph (144.84 km/h) | 90.22 mph (145.19 km/h) |
| 95 mph (152.89 km/h) | 95.23 mph (153.26 km/h) |
| 100 mph (160.93 km/h) | 100.24 mph (161.32 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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