The Specialized Ground Control 2 Bliss is the latest generation of the Specialized Ground Control tyre. The Ground Control name has been around almost as long as mountain biking has, with Specialized refining & improving the tyres all the time. The current Specialized Ground Control tyre is an exceptionally versatile trail tyre designed for riding all day long an all surfaces. The knobbly bits on these tyres have been CAD engineered to provider a stronger knob structure for optimum braking & traction while keeping the tyre surfaces adaptable for different trail conditions. The Ground Control uses Specialized’s own Gripton rubber compound which gives a grippier, quicker rolling tyre so you have the confidence to go fast in all conditions. As a 2 Bliss ready tyre you can run the Ground Control either with a standard tube or on a tubeless setup. Features Casing: 60 TPI Bead: Foldable Butyl wrapped bead = 2 Bliss Ready Compound: GRIPTON 650b x 2.1"; psi 25-50; approximate weight 635g