CNC machined front hub,3mm thick spoke flanges, with dual disc brake rotor mounts. It features 20mm thru axle bearings, but can also be used with a standard 3/8 front fork, thanks to the included 20mm to 3/8 ( 10mm ) adapters, a Gemini exclusive, that are included with your purchase. The 20mm end caps, if you're using this wheel with a 20mm thru axle fork, are also included. All other hardware is included to mount the wheel into a standard 3/8 axle front fork set, as well as the bolts needed to mount your brake rotors ( Not included )