The Specialized Ground Control Grid 2Bliss Ready 26 inch Tyre is an exceptionally versatile trail tire. CAD engineered knob shapes strengthen knob structure for optimum braking and traction, but keeps knob surfaces adaptable for best ground control. GRIPTON compound helps make this the perfect choice for epic trail rides in any condition. We recommend GRID tires for anyone seeking the utmost in flat and sidewall protection.  Specialized Ground Control Grid 2Bliss Ready 26 inch Tyre Features Bead: Foldable Butyl wrapped bead = 2Bliss Ready Compound: GRIPTON 26 x 2.3; psi 25-50; approximate weight 700g