Vittoria Air-Liner Light is the new insert for mountain bike tubeless tires that enhances the performances and capabilities of the wheel-tire system for Cross-Country, Down-Country and Trail applications Features: Developed with XC pro riders and mechanics, and used at the MTB World Cup stages Lightest insert in the market - 55g only - for Cross-Country, Down-Country and Trail tubeless tires Progressive compression of the tire under load provides increased stability, grip and excellent rim protection Enhances the ride feel while increasing stability and grip In the event of puncture, it allows run-flat riding with minimal power dispersion