The Vittoria Airliner Light XC Trail 29x 2.1-2.4 is a game-changer for mountain biking enthusiasts seeking enhanced tire performance with minimal weight. This tire insert offers the same pinch-flat resistance and performance boost as the Air-Liner MTB, but with a significantly lighter construction. Designed to reduce rotational mass above the bead, it strengthens the sidewall while allowing the tread to maintain optimal contact with the terrain. Whether navigating challenging trails or cornering at speed, this insert ensures stability and prevents tire deformation. Provides exceptional pinch-flat resistance and tire performance enhancement Ultralight design reduces rotational mass for improved handling Reinforces sidewall while allowing the tread to maintain contact with the ground Prevents punctures and eliminates rim strikes and snake bites Expands to fill the void as a run-flat in case of a flat tire Enhances stability, speed, and reactivity for marathon, XC, or down-country tires