Up to this point, e-Rustler, e-Stampede, Slash 2wd and 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 e-Rustler, e-Stampede, Slash and 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!, Bearings are not included with these kits (4 bearings are needed for each kit), VXL and Slash owners: Your truck comes stock with 5 x 11mm bearings, SKU: RCHOB1742