Bones REDS Bearings are a popular performance-and-value upgrade for roller skates, built to Bones Skate Rated specifications for a smooth, dependable roll.Each set includes 16 bearings—enough for a complete pair of quad roller skates—and is available in both 7mm and 8mm sizes. Choose the bearing size that matches your skate axles. Quantity: 16 bearings Sizes: 7mm or 8mm Shield: Single removable, non-contact rubber shield for easier cleaning and reduced friction Retainer: High-speed nylon ball retainer Lubrication: Pre-lubricated with Bones Speed Cream Use: Roller skating, rink, outdoor, rhythm, derby and park setups Order Bones REDS roller skate bearings online from Bo’s Boots on Wheels for shipping throughout the contiguous United States, or visit our San Diego skate shop for help confirming whether your skates use 7mm or 8mm bearings.