Wheels, swivel and fixed castors with pneumatic rubber tyres are used for maximum floor surface preservation. They can be used both indoors and outdoors at speeds of up to 25 km/h. Customers can also choose between ribbed profiles and zig-zag profiles to suit different situations. The thickness of a pneumatic tyre is given in the form of a ply rating. The higher the number, the stronger the tyre. To guarantee a long service life, the specified tyre pressure should be maintained and checked at regular intervals. This is the best way to ensure a high level of operational comfort on challenging surfaces.