This is it! the ULTIMATE BMX HUB. The Onyx BMX Ultra SS series is designed around the biggest, toughest, and strongest riders in the world. A Super sized bearing and clutch assembly can handle the highest torque outputs you can deliver. This model is adaptable to every axle standard from 10mm (3/8”) all the way up to 20mm Thru-Bolt. Available in 36 spoke and fits our proprietary Ultra SS Cogs.