Fit & Design: Advanced knob shaping creates extra gripping edges, and reinforced side knobs offer enhanced stability when cornering at speed An all-around trail tire excelling on everything from loose cross country race courses to heavy all-mountain riding DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners DD - Double Down construction features two full 120 TPI casing layers reinforced with a butyl insert TR - Tubeless Ready - sealant required WT - Wide Track casing optimized for rims over 35mm internal width