DescriptionKIT (8) TAMIYA TAMTECH FORMULA 1 1/14 Scale. Ceramic Lightning Econo RC Car & Truck Bearing Kit. Our Economy line of ceramic hybrid bearings are specially designed for on-road or relatively clean driving environments. These bearings have stainless steel races, retainers and shields with ceramic balls. The ceramic ball provides lower friction, increased durability and increased speed.. All Ceramic Econo RC bearings are packed in grease and will require a short break in period to loosen up.