Bones REDS bearings were developed to be an affordable alternative to Bones Swiss bearings. They feature ground and super finished chromium steel balls and races, a high speed, removable nylon ball retainer, Bones Speed Cream lubricant and a removable, non-contact, frictionless red rubber shield. This combination of Skate Rated design, quality components and careful quality control makes them faster, smoother and longer lasting than any other bearings in their price range, so let the good times roll with Bones REDS. All Bones Bearings are Skate Rated to withstand the destructive forces created by high performance skating. They have adjusted the tolerances, clearances, lubricant, and component materials to optimize Bones Bearings for use in dirty, high impact environments where you skate. Thats why they roll faster and last longer than mere ABEC rated bearings.