Michelin Protek Max 29 40mm Presta Valve Tube. Tired of constantly putting air in your tires The Michelin Protek Max 29 inch PV mountain bike tubes need to be inflated less often than classic inner tubes thanks to new self sealing technology. Because of its unique design, the Michelin Protek Max inner tube creates a compressive force if it is pinched or poked that seals itself naturally while a conventional tube simply balloons and stretches. The addition of sealant inside the tube further accentuates the self sealing effect. So if you take your mountain bike on the road less travelled, you need not worry about a flat. The Protek Max is also easy to install. Thanks to its square shape the tube naturally positions itself in the rim well and doesn't twist, unlike conventional tubes. So if you're tired of constantly buying and installing new tubes or filling tubes that leak due to tiny punctures, just fill it and forget it with the Michelin Protek Max 29 inch 40mm PV Mountain Bike tubes.
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