200mm Nylon Castor Wheel with 20mm Roller Bearing, 80mm Tread Width and 58mm Hub Length. This wheel has a load capacity of 550kg.
This is a high quality, low maintenance, impact resistant wheel that has a high load capacity. The nylon material is extremely resistant to salts, greases, acids and alkalis and will not mark or damage concrete floors. This makes Nylon probably the most castor wheel material.
The wheel has a roller bearing in the hub (central part of the wheel) which consists of rollers made of steel within a cage. These rollers rotate between the axle tube and the wheel hub. This makes the rolling resistance of the bearing relatively slight, even under heavy loads. Roller bearings are rugged, robust and largely maintenance-free.