After an extensive research and development process, Smokem Racing have released their new steel drive cups for the TRF417. Made from a special hardened alloy steel, these are some of the toughest wearing drive cups available on the market today, verified by numerous test drivers over a range of racing conditions. They are also hard coated to further increase durability. The spool cups are ready for use in the TRF417 line of electric tourers without blades, while the gear diff cups suit the TRF417 Gear Diff Unit II with the white TRF417V5 blades.