The DHF incorporates ramped knobs for low rolling resistance and channel-cut knobs to increase gripping edges, giving straight-line control and precise cornering TR - Tubeless Ready - sealant required DD - Double Down construction features two full 120 TPI casing layers reinforced with a butyl insert WT - Wide Track casing optimized for rims over 35mm internal width 3CG - 3C Maxx Grip offers the ultimate in grip and slow rebound properties for unparalleled traction in downhill applications Tubeless 29x2.5 622 TBLS - Fold Bk/Blk 65 120 3GC/DD/TR/WT NoUPC/EAN/GTIN: 4717784034409