Vittoria Barzo XC Race Tire - 29 x 2.40 Tubeless Folding BLK Race Graphene + SilicaBuilt using XC Race Formulation and have been tested at the UCI elite levels The Race Formulation employs Graphene and Silica, providing increased wet grip and suppleness, and combines a 60TPI tubeless ready casing to optimize deformation Reduces rider fatigue while simultaneously increasing raceday reliability TECH SPECS Model Barzo XC Race Size 29" Width 2. 4" Casing Nylon TPI 60 Compound Race Formulation Graphene + Silica Bead Folding Type Tubeless