Stronger and more reliable than ever to accommodate the additional stress of larger cassette cogs, more capable bikes, and even more challenging trails, the Stan's Notubes Neo Speedsync Freehub is a direct replacement for your Neo Ultimate hub, and an exceptional tool-free upgrade for all standard Neo hubs. Available in Shimano/SRAM, Campagnolo, and SRAM XD versions, this freehub facilitates quick and easy conversion between differing drivetrains and boasts the Neo's smooth, super-responsive six-pawl, five-degree engagement.