Kenda Small Block 8 Pro Tire - 27.5 x 2.1, Tubeless, Folding, BlackXC Racing tire with lots of speed and grip, well suited for a variety of riding conditions. DTC: Dual Tread Compound increases center tread life with the use of Kenda's L3R PRO compound (60 shore A durometer); cornering grip and control are increased by the use of Stick e rubber (50 shore A durometer)for the shoulder knobs 8 smaller Nevegal knobs with L3R PRO rubber across the center tread for efficiency and grip with raised Stick E rubber shoulder