All enduro and motocross bikes are nowadays supplied with inner tubes in the tyres. These tubes are often very thin (1.4 mm) and you easily get a flat tire. The Metzeler tube HEAVY DUTY is made of butyl and is 3 mm thick. Butyl is known for its excellent air impermeability.

• reinforced air valve
• HEAVY DUTY tube
• thickness 3mm

fits for:

21": 3.00-21, 3.25-21, 80/100-21, 90/90-21, 90/100-21

18": 100/100-18, 110/100-18, 120/100-18, 110/90-18, 120/90-18, 130/90-18, 130/80-18, 140/80-18,
4.00-18, 4.50-18