Wide knobs down the middle provide control under braking and L-shaped side knobs assure support when carving loose turns EXO - sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners Tubeless 29x2.8 622 TBLS - Fold Bk/Blk 35 920 60 DC/ECO/TR NoUPC/EAN/GTIN: 4717784033327