The wheel centre of the SE series is made of triple-welded pressed steel with a tubular steel hub, onto which the high-quality elastic solid rubber tread is vulcanised. The tread is pressed onto the wheel centre for items with a suffix of -Z. The black tread is very quiet and has very good floor preservation properties. The tyres have a hardness of 65 Shore A and provide a very high level of operational comfort. The wheels are designed specifically for the transport of heavy loads in a wide range of applications. Speeds of up to 16 km/h are possible thanks to the rugged design.