With the Rock Razor 27. 5in Tire, Schwalbe offers its first true semi slick gravity and enduro tire that performs superbly on hardpack trails. The Rock Razor features low profile, medium spaced center knobs for speed on hardpack or semi hardpack, and the tires aggressive side lugs deliver excellent cornering traction, making this the perfect tire for high speed, technical terrain. Schwalbe quadruple reinforces the sidewalls and provides a double layer of material just beneath the tread for added protection. The SnakeSkin version of the Rock Razor features the company's original puncture resisting casing, while the SuperG for Super Gravity version bulks up for heavy duty performance.