29-Inch

Specialized's Ground Control GRID is an exceptionally versatile trail tire. CAD engineered knob shapes strengthen knob structure for optimum braking and traction, but keep knob surfaces adaptable for best ground control. The GRIPTON compound helps make this the perfect choice for epic trail rides in any condition. Specialized recommends GRID tires for anyone seeking the utmost in flat and sidewall protection. - Bead: Foldable - Butyl wrapped bead, 2Bliss Ready - Compound: GRIPTON - 29 x 2.1" psi 25-50; approximate weight 710g - 29 x 2.3" psi 25-50; approximate weight 810g

Punctures suck, which is why we've incorporated our legendary Armadillo flat-resistant technology into the Fast Trak Armadillo tire. Not only that, but we also took the tread design of the Fast Trak a step further by manipulating each knob with Finite Element Analysis. Paired with extensive rider feedback and design experience, the result is an XC tire with less rolling resistance and more traction, all with Armadillo puncture protection from bead to bead. - Casing: 60 TPI - Bead: Wire - Compound: 60a - Flat Protection: Armadillo - psi 25-50