The Ground Control 2Bliss Ready is an exceptionally versatile trail tire. CAD engineered knob shapes strengthen the knob structure for optimal braking and traction, but it keeps the knob surfaces adaptable for best possible ground control. And now, it also features our own GRIPTON® compound that maximizes mechanical grip, damps vibration, and offers unparalleled traction in either wet or dry conditions. Casing: 60 TPIBead: FoldableButyl wrapped bead = 2Bliss ReadyCompound: GRIPTON®26 x 2.1"; psi 25-50, approximate weight 580g26 x 2.3"; psi 25-50, approximate weight 620g27.5 x 2.1"; psi 25-50, approximate weight 610g27.5 x 2.3"; psi 25-50, approximate weight 670g29 x 2.1"; psi 25-50, approximate weight 630g29 x 2.3"; psi 25-50, approximate weight 730g