Although the R Series is designed not to withstand much load capacity as the B Series but R Series casters are still capable of 30 kgs per caster. Good PP wheel is hard to break and very wear resistant.
Superior than most of small China caster, better steel & wheel quality. So the caster is definitely has higher load capacity and last longer. In Light duty Series of Gia Cuong Thinh, plastic casters are preferred over rubber casters.