Designed with raw steel material that meets or exceeds standards to produce a long-lasting service life. All hub assemblies go through a vacuum vulcanization process to enhance the structural integrity of the seal and rubber components. Ball bearings are spaced precisely to the appropriate clearance for smooth rotation and abrasion resistance. High quality rubber optimizes the seals performance and durability against high-temperatures and weathering. To ensure a smooth surface, free from defects, all bearing housings are manufactured with polyamides for added impact toughness and age resistance.