The Ground Control is an exceptionally versatile XC trail tyre. Weve optimised the tread using FE Analysis resulting in a tyre that rolls fast & provides increased grip & traction in all conditions.> Casing: 420/D1 for 15% enhanced cut resistance> Bead: foldable> Butyl wrapped bead = 2 Bliss Ready> Compound: 60a> 26&34; x 2.3; psi 35-65; approximate weight 650g> 29&34; x 2.3; psi 35-65; approximate weight 760g