These ceramic balls are made of N4Si3 / trisilicon tetranitride and promise to be lighter, smoother, harder, heat-resistant and rustproof. Ceramic is also known for reducing friction. Combined with strong steel casings, high tolerances, dust-resistant ball retainers and premium lube these bearing are meant to go fast. Now including their profiled steel spacers.
Abec: No rating
Type: Non Built-in