Control, the main focus of the new Specialized Purgatory Control Tyre, ensures that it cements itself as the standard bearer for all mountain performance. By applying FE Analysis to the standard Purgatory tread, the Control has been optimised so every single knobs gives its all out on the trail without negatively affecting rolling resistance. A tough 60 TPI casing offers 15% enhanced cut-resistance over the race light S-Works model & is combined with tough rubber compounds to withstand daily riding over rock & roots. The folding bead of the Purgatory Control has been wrapped in Butyl to provide an air-tight fit on compatible wheels allowing the tyre to be ran tubeless at lower pressure for even more control & traction. Description by Mark, Rutland Cycling Web Team.