Main part : 90.0% Rubber - Isobutylene Isoprene Rubber (IIR) - Butyl, Main part : 10.0% 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 that protects them from perforations (B'Twin carry case, original packaging, etc.).
To find out the size of your wheels, check the inscriptions on the side of the tyre. Always have a spare inner tube and a pump.