Stan's Freehub Bodies and Parts. Features: Replacement freehub bodies include pawls and springs pre-installed MK3, Comp, and Team wheels all have Durasync freehub bodies. Pro wheels feature the Speedsync freehub bodies Neo hubs with Durasync can be upgraded to Speedsync Speedsync freehubs offer 6-pawl, 5 degrees, double engagement with 3 stainless bearings for axle stability Durasync S freehubs offer simultaneous 6-pawl, 10 degrees, engagement with 3 stainless steel bearings for axle stability Durasync freehubs offer simultaneous 6-pawl, 10 degrees, engagement with 3 bearings for axle stability OneUp feehub bodies require the Shark Cluster, OU-3610
