The TRF 416X was developed using race data recorded by Team Tamiya's worldwide team drivers. The TRF 416 has won numerous races around the world and has become a very popular championship-winning machine. As a result, the worldwide demand for the TRF416 lead Tamiya to produce two additional production runs of the product, which sold out instantly. The new and improved TRF 416X will be a strong candidate at the 2010 IFMAR world championship. If you are in the market for a 1:10 scale eletric RC car, definitely check this one out, the new revisions make this car unstoppable. Our TRF 416X Ceramic Ball Bearing kit takes this kit to another level. All of the ceramic bearings in this kit are oiled with our SIN oil NOT greased for super high performance.