New sidewall shield technology, single ply, Dual Tread Compound. Voted the #1 tire by MBA magazine 4 years in a row. DTC - Dual Tread Compound is a combination of two different rubber compounds, L3R Pro (center knobs) and Stick-E rubber (corner knobs) UST - Universal Standard Tubeless licensed tire for use with UST designated rim combinations for the best possible tubeless interface Standard 29x2.2 622 Wire Bk/Bsk 65 740 60 DTC NoUPC/EAN/GTIN: 047853623451