Tioga Pyscho Genius Aramid Bead, Black, 26x2.30mm Tioga Pyscho Genius 26x2.30 Aramid Bead (Folding) All Black (new 2011 version of the famous Psycho) Inspired by the cornering prowess of the iconic Tioga Psycho line of tires and infused with an innovative approach to knob functionality; The Psycho Genius is the intelligent choice for technical trails SYNERGY DUAL COMPOUND - Tread combining MOTION360 with HIGH ENERGY, matched to maximize strengths of the specific rubber compound with intended knob functionality MAG60 - 60 thread count casing incorporating unique rubber texture on its sidewalls for added strength and cut resistance while retaining its suppleness ISO Diameter: 559. ISO Width: 54mm. 60 TPI