Jefe Velo Jayhawker Wheelset Replacement Freehubs Jefe Velo Jayhawker Wheelset Replacement Freehubs, 6-pawl freewheel drivers for the Jayhawker™ wheelset. They’re here not only to demonstrate our support for the wheelset and its specification, but also because you and I have a lot of bikes and like to be able to use wheelsets across different platforms. Buy a Jayhawker™ with SRAM XD, and pick up a separate Microspline driver for your other bike. You know, like that. Or maybe you just want to geek out over the awesome 6-pawl engineering that give you way more points of engagement than you really need to be redundant on out on the trail. Available in Shimano HG (84g), Microspline (89g) and SRAM XDR (78g). If you need an XD driver, just use an XDR with the included spacer.