Membrane : 100.0% Rubber - Synthetic Valve : 100.0% Brass
Our inner tubes are tested continually by our professional teams, such as the U-19 Pro Racing Team and the MTB Racing Team.
To guarantee optimal quality, 100% of our inner tubes are inflated for a period of 8 hours.
Carry your inner tubes in a container to protect them from getting punctured (tool case, original packaging, etc.).