Bicycle Headset Bearings
Bicycle Headset Bearings
| Bearing No. | Overall Dimension | Steel Ball | |||||
| Inner diameter d | Outside diameter D | Width B | Chamfer a | Bevel β | Quantity | Dimension | |
| H879 | 40.00 | 51.00 | 6.50 | 36° | 36° | 25 | 3.175 |
| H889 | 40.00 | 52.00 | 8.00 | 36° | 45° | 30 | 3.175 |
| 52427 | 42.00 | 52.00 | 7.00 | 45° | 45° | 38 | 2.381 |
| P03 | 30.15 | 41.0 | 6.5 | 45° | 45° | 25 | 3.175 |
| P03K | 30.15 | 41.0 | 6.5 | 36° | 45° | 25 | 3.175 |
| P04 | 30.15 | 39.0 | 6.5 | 45° | 45° | 26 | 2.778 |
| P08 | 30.15 | 41.8 | 6.5 | 45° | 45° | 25 | 3.175 |
| P09K | 27.15 | 38.0 | 6.5 | 36° | 45° | 20 | 3.175 |
| P09 | 27.20 | 38.0 | 6.3 | 45° | 45° | 20 | 3.175 |
| P08H7 | 30.15 | 41.8 | 7.0 | 45° | 45° | 25 | 3.175 |
| P08H8 | 30.50 | 41.8 | 8.0 | 45° | 45° | 25 | 3.175 |
| P08H8F | 30.50 | 41.8 | 8.0 | 45° | 45° | 25 | 3.175 |
| P16H7 | 40.0 | 52.0 | 7.0 | 45° | 45° | 30 | 3.175 |
| P16H8 | 40.0 | 52.0 | 8.0 | 45° | 45° | 30 | 3.175 |
| P22H8 | 35 | 47 | 8.0 | 45° | 45° | 28 | 3.175 |
| 518H8K | 40.0 | 51.8 | 8.0 | 36° | 45° | 30 | 3.175 |