MOTOZ TUBES $11.99 – $49.99 MOTOZ tubes are made from 100% high grade Natural Rubber. Available in 3 variants: 4mm Uber – Ultra Heavy Duty Tube – 4mm ultra heavy duty. – Specifically Designed for Desert, Safari & Enduro racing 3mm – Heavy Duty Racing Tube – 3mm thick – heavy duty. – Specifically designed for intense MX racing 1.6mm – Standard Series Tube – 1.6mm thick – stronger than most rival heavy-duty tubes. – Made of 100% natural rubber. – Suited for a range of all general purpose applications, including carrying as spare