For example if a trolley moves on carpet or floor tiles and must be quiet
, a rubber wheel casters are preferable. If the flooring is industrial, such as a concrete floor, then nylon or polyurethane castors are better options. So if its castors' or even casters' you need then consider the options of fixed castors versus swivel castors, the loads capacities and the flooring they are running on. Fulfilling these basic criteria will enable you to buy the most appropriate casters for your requirements.