Skateboard Bearings. Keep your set up at full optimum working tilt by getting a good set of Skateboard Bearings that will allow you to roll smoother, faster and get clean lines.
You will have to assemble the Skateboard Bearings yourself once you purchase them - but this is pretty easy to do. Unscrew the wheel from the truck, pull it off. Get a screwdriver and prise the existing bearings out. Pop in the new set and screw the wheel back on. Job done.