The GravelKing SS is a perfect middle ground between the Slick and SK models. Part of the newly updated GravelKing line the latest model year sees improved rolling resistance TuffTex belting and redesigned bead for improved retention. Fast rolling file style tread down the center with micro knobs on each side and long rectangular knobs on the shoulders strikes a perfect balance for mixed gravel and road use. Standard belting on all GravelKing models helps to prevent punctures and flats while increasing over all durability