This castor fixed is composed of a mechanically welded frame made of thick steel and two cast iron rollers with a tread polyurethane. These rollers with a diameter of 250 mm are equipped with a ball hub to limit friction under heavy loads.
Very durable, this castor is perfectly suitable for extreme handling of 3600 kg per wheel, or 10 tons on 3 wheels (It is always assumed that one castor out of 4 does not make proper contact with the ground).