Why We Make It Most of us came up on BMX, whether we raced or just jumped our bikes over random stuff in the woods with our friends. It gave us a foundation in bikes that was hugely valuable. So, we make BMX hubs, not only for all the riders still on track trying to go fast, but also to honor some of our core bike memories. Why You Want It These are redesigned, lightweight, race-focused , BMX disc hubs. The 36-hole rear has a 6-bolt rotor mount, and incorporates the legendary King RingDrive ™ with internal needle bearing, just like the King BMX hubs of yore. The rear hub is available for 15mm thru-axle or M10 bolt-on . The rear hub come s stock with our 72T RingDrive ™ for quickest engagement but is also compatible with our 36T RingDrive ™ for lower drag and higher maximum speed. We m aintain stiffness with a one-piece hardened stainless steel axle. These hubs feature optimized flange diameter and flange angles for 20" rims. The bolt-on version of the rear hub comes with steel bolts . Ti bolts for this hub are also available in the King webstore. Engineered, manufactured and assembled in Portland, Oregon, USA King Lifetime Warranty Canted flanges for stronger wheel builds Patented RingDrive system with 72 simultaneously interfaced points of contact for unmatched hub engagement Legendary made-in-house bearings 36-hole drilling Easily serviceable with a T10 and pick or pen knife Completely rebuildable with our Universal Hub Service Tool Responsibly lightweight Ceramic bearing upgrade available Specifically designed for BMX 15x110mm thru axle and M10 bolt-on standards Hub Specifications Axle Width: 110mm Center to Flange NDS: 20.15mm Center to Flange DS: 29.4mm Flange Diameter: 57.4mm Spoke Hole Diameter: 2.6mm Chainline: 43.5mm