It's the Schwalbe Rock Razor in 27.5 x 2.35. TL-E EVO and Snakeskin Super Gravity
This semi-slick tire is brand new to the Gravity and Enduro scenes. Schwalbe suggests this tire as an option especially for the rear wheel and for very fast, dry trails. The tire tread is very low in the center for low rolling resistance, while the sides have big cornering knobs for confidence and grip in the turns.