The XMR hub set is our newest ISO six bolt disc hub. The demanding nature of off-road riding requires a durable hubset that you can trust. Our XMR hub set has been created with the same reliability you can expect from White Industries components plus we’ve upgraded the hub using the newest standardized technology and advancements in the industry. What is the same? We continue to offer the freehub body in 6-4 titanium as it is the best and most durable for this application, the drive system is still available for Shimano/SRAM 8/9/10/11/12, Campy 9/10/11 speed, and SRAM XD/XDR 11/12 systems. What is new? XMR can be outfitted with a new high engagement ratchet system or with stock ratchet system, new colors: red, blue, gold, pink, purple, silver and black are now available, and the hub is offered with QR or easy change out thru axle systems: 12mm thru or 15mm thru for the front, and 12x142mm for the rear. The XMR is the lightest ISO six bolt hub we have ever offered, and yet, it is still durable to stand up to all your needs be it Cross, Road or Mountain biking.