Complete set of high-speed, blue rubber-covered ball bearings for XB808 are used throughout the drivetrain for maximum efficiency. All ball-bearings have the highest tolerance and offer maximum performance. Ball-bearings for the steering system are degreased and lightly oiled with Aero Shell® Fluid 12 for maximum smoothness and long life. All drivetrain ball-bearings come with a special high-temperature resistant grease to ensure proper lubrication. Highest-quality, individually measured, selected and inspected bearings manufactured based on XRAY’s highest tolerance specifications. Set of 24.