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 mountain bike 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 punctures (B'Twin tool drum, original packaging, or bag).
To find your wheel size, check the information printed on the tyre sidewall. Always carry a spare inner tube and a pump.