We have upgraded this bearing to include our own polymer cage and american made balls. The bearing is double sealed to help eliminate leaks and greased. The bearing fits the O.S. MAX .21 RG, VZ-B and VZ-B V-Spec, RB Concepts WS7, WS7II and Novarossi off-road competition engines. This bearing will also fit any other .21 to .28 competition engines that use the same bearing dimensions which are 7mm x 19mm x 6mm. Specifically made for high RPM applications. Double the RPM capability over steel bearings. Reduce friction,rotating mass. Less vibration and cooler running.

Used and recommended by Adam Drake Team Losi ,EB Mods,RB Mods etc.