Compatible with XD driver SRAM Cassette bodies. 148 mm hub length, 12mm tru-axle, with CNC 6061 AL Body and 7075 AL Axle. Sealed cartridge bearings and radial needle bearing. 32h design. 

Also a great replacement rear hub for the first generation of Apollo Bike with XD driver freehubs .  Perfect for custom wheels or if you want to upgrade your rims.  You can also use this hub as a replacement on your X1 or your Apollo (2nd gen, 2020) as long as you change the cassette to a XD driver one.