Pneumatic tyre with tube, outstandingly high operational comfort, vibration-absorbing, exceptionally high floor preservation. The tyre thickness is indicated by the ply rating number. The higher the ply rating number, the better the strength. Light tyres have a ply rating of 2 to 4 and heavy tyres 6 to 10. Wheel centre pressed steel, electro-plated. Chemical resistant to many aggressive substances, except oils.