Weve optimized the tread to bite hard in loose corners while our exclusive gripton compound results in a faster grippier tire for any off-road excursion. Meanwhile the grid casing provides the utmost in cut & flat protection at the sidewalls. & of course the 2bliss ready design is the icing on the cake allowing you to run lower tire pressures & all but eliminate the risk of pinch flats. Casing: additional sidewall protection for exceptional durability, plus sidewall stiffness for stability. Bead: foldable butyl wrapped bead = 2bliss ready compound: gripton 26 x 2.3", psi 25-50, approximate weight 710g 27.5 x 2.3", psi 25-50, approximate weight 785g 27.5 x 2.6", psi 20-40, approximate weight 970g 27.5 x 3.0", max ride 25 psi / max install 35 psi, approximate weight 1100g 29 x 2.3", psi 25-50, approximate weight 800g 29 x 2.6", psi 20-40, approximate weight 930g