RPM knows that op to this point, electric Rustler, Stampede, Slash & Bandit owners have relied on bushings or undersized, weak bearings to handle the punishing chores of supporting the wheels. RPM’s new front and rear bearing carriers allow Rustler, Stampede, & Bandit owners to install massive 5mm x 11mm bearings (not included) that will not only improve performance, but will increase the time interval between maintenance periods. In addition, our front and rear bearing carriers are molded in black from RPM’s killer blend of bulletproof nylons and are guaranteed not to break! Strength, durability, and performance; Trademark characteristics put into every part RPM builds!