Factory Team 15x21x4mm Bearings Set of Four (ASC91566)

Factory Team 15x21x4 mm bearings are a four-pack of precision bearings built for radio-controlled models. Sized 15x21x4 millimeters, they’re designed to replace worn bearings and restore smooth, reliable rotation in rotating assemblies such as wheels, drive systems, and gearboxes.

These compact bearings fit RC components that use the 15x21x4 mm size, helping reduce friction, maintain consistent performance, and extend the life of moving parts.