Michelin Tube 700 x 32-42 Protex-Max AV

Serious stopping power, uncompromised control. Michelin have unveiled a new bicycle inner tube they have been developing, which when punctured reseals and repairs itself. The Protek Max inner tubes not only contain a sealant but also compress when punctured to help with the repair process.Bicycle tire tubes need to stay firmly inflated against the inner surface of the tires themselves to ensure safe, rugged riding. But in the unlucky event of a puncture, that same pressure will only stretch the hole wider, even when it's closed with sealant. Michelin's new line of ProTek Max inner tubes employ a radical design to avoid this problem. The new Protek Max inner tubes have a slightly different square style cross section and profile to standard tubes. Due to its unique textured outer surface, the air pressure inside actually compresses a puncture closed, instead of blowing it further open. This compression helps seal any punctures and helps the internal sealant repair the hole quicker, provi