The DHF incorporates ramped knobs for low rolling resistance and channel-cut knobs to increase gripping edges giving straight-line control and precise cornering. DH - Sealant-compatible rubber is used with the familiar Maxxis dual-ply 60 TPI downhill construction and butyl insert for support and rim protection to offer the benefits of increased grip and reliability. 3CG - 3C Maxx Grip offers the ultimate in grip and slow rebound properties for unparalleled traction in downhill applications