A ball bearing is a high-quality mechanical component that uses balls in a ring-shaped cage to minimize friction and enable effortless rotation – the ideal solution for smooth and long-lasting performance of your bike.

– Deep groove ball bearing for bottom brackets, hubs, pedals, derailleur guide wheels, suspension pivot
– CB-139, 6904 2RS (inner x outer x height) 21.5x37x9mm
– Suitable for Bosch

Specifications:

Brand: Union

Model: CB-139
Type: Ball bearing
Inner diameter: 21.5mm
Outer diameter: 37mm
Height: 9mm
Material: Steel
Color: Silver/Black

Supplier item number: 726018