Raised square-edged center knobs provide climbing and braking traction on dust covered trails, and oversized cornering knobs keep you planted in the turns DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners SS - SilkShield offers bead to bead puncture protection covering the tread as well as the sidewalls TR - Tubeless Ready - sealant required Tubeless 700x40 622 TBLS - Fold Belted Bk/Blk 75 530 60 DC/SS/TR NoUPC/EAN/GTIN: 4717784038063