Kenda Small Block 8 XC Mountain Bike Tire (DTC, Folding, 26x2.1) by Kenda. $31.97. Excellent hard pack XC race tire. 8 Nevegal shaped but smaller knobs across the tire for better 'bite'. DTC - Dual Tread Compound offers cornering grip with faster center line acceleration. One of the fastest rolling tires in the Kenda Premium line.