Fast rolling directional tread with widely spaced, ramped knobs that reduce rolling resistance while providing optimal grip on hard packRace line features a two layers of 150 TPI casing for a supple feel and improved controlCST - Cross Shield Technology casing provides extra pinch protection designed to prevent tread and sidewall damageGUMX â Rubber compound tailored for different disciplines with a focus on rolling efficiency and gripTubeless29x2.1622TBLS - FoldBk/Blk150x2GUMX/CST/EBIKE25NoUPC/EAN/GTIN: 086699739988