Skateboard bearings are the core components of skateboard sports, and their performance directly affects the sliding speed and handling experience. International universal models include 608ZZ (8 × 22 × 7mm) as the mainstream, as well as specifications such as 6000ZZ and 6900zz
Core components: including dust cover, rolling elements (steel balls or ceramic balls), retaining frame, and inner and outer steel rings, with rolling elements usually in groups of 7
Material classification:
Chromium steel (such as SAE52100 steel): the mainstream choice, balancing durability and cost-effectiveness
Ceramic balls (such as silicon nitride): have lower friction and higher rotational speed, but are expensive and brittle
