Onyx BMX Pro Rear Hub - 3/8" 10 x 110mm Black 36HOnyx BMX Pro Rear Hub 3 8" 10 x 100mm Black 36H. Machined to the tightest tolerances. Onyx hubs use sprag internals for strength extremely low rolling resistance and infinite points of engagement. All Onyx hubs come standard with ceramic hybrid bearings so there is no need to upgrade. Ceramic hybrid bearings 7075 Aluminum Hub Shell Adjustable preload Titanium bolts Extremely low rolling resistance Silent instant engagement 5 year limited warranty Made