BLACK BEARING Headset Bearing 39.7x50.8x7.14 mm HB-B543

Designed for a bicycle steering column, which is the mechanism that allows the fork and handlebars to rotate smoothly.

Features:

• 2RS seals: Labyrinth seals with double lip of last generation. Better resistance to water and dust, combined with low friction.
• Ground raceways for better fluidity and longer life.
• Superior quality lubricant.
• High quality of marbles, label abec 5.
• Maintains balls by metal cage.

Dimensions:

• Inner diameter 39.7 mm. 
• Outer diameter 50.8 mm. 
• Width 7.14 mm.