The best bearings money can buy. Bones swiss ceramics are made with 100% high purity silicon nitrade ceramic balls. Removable high speed nylon ball cage and rubber shields. Lubricated with low viscosity Bones Speed Cream. Fast, long lasting and easy to clean. Set of 8. All Bones Bearings are Skate Rated™ to withstand the destructive forces created by high performance skating. This is our way of saying that just using a bearing with an ABEC rating is not enough to ensure that a bearing will perform well for skating, since ABEC ratings were intended for electric motor bearings, not skate bearings. We have adjusted the tolerances, clearances, lubricant, and component materials to optimize Bones Bearings for use in dirty, high impact environments... where you skate. That's why they roll faster and last longer than mere ABEC rated bearings.
