Casing: 60 TPI Bead: Foldable Butyl wrapped bead = 2Bliss Ready Compound: GRIPTON® 27.5 x 2.1", psi 25-50, approximate weight 610g 27.5 x 2.3", psi 25-50, approximate weight 670g 29 x 2.1", psi 25-50, approximate weight 630g 29 x 2.3", psi 25-50, approximate weight 730g