The DHF incorporates ramped knobs for low rolling resistance and channel-cut knobs to increase gripping edges, giving straight-line control and precise cornering. 3C Maxx Grip compound paired with a Double Down 120 tpi casing 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 Tubeless 27.5x2.5 584 TBLS - Fold Bk/Blk 60 1390 120 TR/DD/WT NoUPC/EAN/GTIN: 4717784030883