Losi LOS217004 7x11x3mm Ball Bearing

This Losi 7x11x3mm ball bearing is a precision-sealed replacement bearing sized to fit a wide range of Losi RC vehicle drivetrains, wheels, and shafts that use this common bearing dimension. Ball bearings support rotating components such as axles, gears, and wheel hexes, allowing them to spin freely with minimal friction and resistance. Over time, bearings wear out from dirt intrusion, water exposure, or repeated impact loads, which increases drivetrain drag and can lead to premature failure of surrounding parts if left unaddressed. Replacing worn bearings with this factory-matched pair restores smooth, low-friction rotation and helps protect other drivetrain components from added stress. Built to precise tolerances, these bearings are a direct factory replacement rather than a performance upgrade, ensuring correct fitment without any modification needed. Keeping a set of spare bearings like this on hand is a smart move for regular maintenance, since bearings are a common wear item on any actively driven RC vehicle. This pack includes two bearings, enough to service one axle or shaft location during a rebuild or maintenance session.