The Challenge Latex tubes are some of the more robust latex tubes you can buy. They are made in standard road diameter as well as a larger diameter aimed higher volume cyclocross tires. The valves are bonded to the tube for added durability. The valves are smooth with a removable valve core that can be either replaced if damaged or substituted for longer valves for aero rims. The road version of the tube is available in 47mm valve length while the larger diameter cross version comes in 47mm and 60mm lengths.
These tubes are made by seasonally, so they are not always available. We try and purchase as many as we can when we can.