Despite the size of the caster (Ø100 - 200mm), R Series is rated as Light duty type - only 60 kgs per caster. Rubber tread is just light cushion but will help reduce noise and surface protection.
The 2-stage ball bearing is made of heat-treated steel to increase friction and wear resistance. The heat treated swivel neck ensures a secure hold of the bearing balls in harsh situations. Has Z shape dual brake pedal - very light and easy to use.