The BlackBearing B4 headset is designed for frames equipped with a 1"1/8 pivot fork. Its 2RS double-lip system ensures optimal sealing against moisture and dust for increased durability, while offering low friction.It is necessary to measure the dimensions of the bearing you want to replace with a caliper to ensure that the BlackBearing B4 bearing is compatible with your bike, while also taking the angle into account.
Features
- Steel bearing
- 2RS seals: double lip, long-lasting performance with less friction
- High-quality "abec 5" balls
- Bearing height: 6.5 mm
- Internal bearing diameter: 30.15 mm
- External bearing diameter: 39 mm
- Angle: 45° internal, 45° external - For 1"/8 fork pivot
