Specialized Air Trak Flex Lite 29" Tire XC speed, unleashed. The Specialized Air Trak Flex Lite Tire is designed for ultimate speed, acceleration, and getting riders to the top stem of podiums. The Air Trak Flex Lite Tire is bred from World Cup XC racing, blending unique compounds, casings, and a high-velocity tread design to help riders get get every ounce of speed in every race. The Air Trak's XC tread design uses a high-speed cluster center tread design, with Block-in-Block shoulder knobs for cornering stability, while the dual GRIPTON T5/T7 compounds balance center rolling efficiency with cornering grip. The Flex Lite casing used for this version of the Air Trak is the lightest Specialized makes, shaving 60 grams from the previous version, maximizing acceleration and climbing speed when every second counts. Features Ultimate XC tread design with a high-speed center tread with a fast-rolling cluster design to reduce rolling resistance, and Block-in-Block shoulder knobs for cornering grip GRIPTON T5/T7 Dual compounds increases straight line speed, with the grippiest compound on the sides for cornering control Flex Lite casing the lightest casing Specialized makes, for lightning-fast acceleration and a 60g reduction in weight from the previous-gen Air Trak SPECIFICATIONSSize29"Bead Folding Compound GRIPTON(R) Dual T5/T7Casing60 TPI Flex Lite Type Tubeless Clincher Intended Use XCApproximate Weight575g (29x2. 2"), 585g (29x2. 35") | Specialized | Air Trak Flex Lite 29" Tire 29X2. 35 | Black | T5/t7 Xc, Tlr