RC Car & Truck Econo bearing kits are the most affordable way to replace stock bearings with high quality standard bearings. Boca's Econo RC Bearings have long been the industry standard for backyard bashers the world over. These bearings have chrome steel races, balls, retainers and rubber seals. All Econo bearings are packed in grease and will require a short break in period to loosen up. Each kit contains bearings for a limited time only at just 99 cents per bearing!