In the early 1970s, the Hub Unit 2 emerged offering more compact, lightweight and efficient solutions. Building on the HBU1 design, HBU2 incorporated a flange with the bearing outer ring. The HBU 2.1 combines an HBU1 with a flange ensuring fast and simple installation on vehicles.
Typically found on non-driven front or rear wheels and can be found on models such as the Audi A3, BMW 3 (E46), VW Golf V, Peugeot 307, Fiat Bravo and Fiat Grande Punto.
Features and performance ：Robust, light-weight and coated flange: avoids galvanised corrosion for easier wheel replacement and longer bearing life.
Accurate bearing pre-load using orbital rolling techniques: provides correct operating conditions for optimum performance and durability.*
High stiffness: ensures a smoother drive and better vehicle handling.Correct induction-hardening processes: strengthens raceways and avoids hub fractures for safety and long service life.
High tensile strength wheel studs: prevent wheel-off conditions.Multiple-lip seal design: keeps contaminants out and grease inside the hub.
Patented glass-fibre reinforced polyamide cages: resist high loads and operating temperatures.SKF GHG Grease: exclusive formula ensures low operating friction.