CEMA 6903 Ceramic Hub Bearing
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The CEMA 6903 bicycle hub bearing measures 17 x 30 x 7 mm: an internal bore of 17 mm, an external diameter of 30 mm and a thickness of 7 mm. It replaces a worn hub bearing when the wheel turns with play or friction, and is designed for those who maintain their bikes and want replacement parts with the right dimensions.
The bearing is available in ceramic or chrome steel, with an ABEC 5 precision rating and double sealing to protect the inside from dirt. The finish is silver and black. Choose the material you prefer. Before ordering, measure the internal diameter, external diameter and thickness of the bearing to be replaced and compare them with the specifications provided.
| Type | Ceramic or chrome steel |
|---|---|
| Internal diameter | 17 mm |
| External diameter | 30 mm |
| Thickness | 7 mm |
| Colour | Silver and black |
| Sealing | Double |
| Precision rating | ABEC 5 |