The Aktiv-8 inner tube is a price fighter among inner tubes. Like other inner tubes, the Aktiv-8 inner tube is made of butyl. This material has good airtightness and a high degree of protection against punctures.
Available in racing 23-25mm inner tube in 47, 60 and 80mm valve lengths. Also available in MTB in sizes 26 ", 27.5" and 29 "