Black Bearing Headset bearing 40 x 51.8 x 8 mm 45/45° D13

Bearings BLACK BEARING B5The reference in bearings for sports The BLACK BEARING B5 range of bearings is specifically designed for cycling (frames, wheels, pedals...), urban sports (In-line skating, Skateboarding, BMX...), motorcycle, quad, Karting, modelism..... Made in Europe or in Japan, the B5 range has been developed and optimized to withstand the most extreme conditions of use.Each component (steel, lubricant, grease...) is selected and assembled with precision. A constant quality control throughout the production process ensures that the bearings meet the highest quality standards. Black Bearing is synonymous with reliability, smoothness, efficiency, rigidity... An excellent replacement bearing compatible with your original bearings. Technical characteristics:- Steel (standard)- "2RS" seals: Double lip labyrinth seals of the latest generation. Better resistance to water and dust, associated with low friction.- Ground raceways for better fluidity and longer life.- High quality lubricant.- High quality balls, "abec 5" label.- Ball retention by metal cage.