The DHF incorporates ramped knobs for low rolling resistance and channel-cut knobs to increase gripping edges, giving straight-line control and precise cornering DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners Standard 24x2.4 507 TBLS - Fold Bk/Blk 65 60 DC NoUPC/EAN/GTIN: 4717784034614