The new Gravel King SS is a perfect middle ground between the Slick and SK modelsFast 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 useStandard belting on all Gravel King models helps to prevent punctures and flats while increasing over all durabilityTubeless27.5x1.5622TBLS - FoldBeltedBk/Brn120No