Extruded from the strongest 6061-T6 aluminum then precision CNC machined, these hubs are a thing of beauty ready to take the beast of your abuse. And this year, we've made them even better by increasing the stiffness of the nylon rim spacer so they can handle even higher pressure than before, a change we hope will secure this hub's position at the top of the podium for years to come. The only choice for high-pressure freestyle riders! Sold in a Set of 4. Bearings sold seperately.