Looking for a tyre that\'s more aggressive than the mixed-tread GravelKing? The GravelKing SK might just be the tyre you need for the more hardcore roads. Aggressive knobs, ZSG Natural rubber compound, puncture protection breaker and AX-α special low rolling resistance casing make the Gravelking the perfect go-anywhere tire. Features: ZSG natural compound Anti-flat casing AX-Alpha cord Weight from 270g Sizes from 700 x 26c & 700 x 32c Available in Black/Black or Black/Brown