Tamiya Mini 4WD Shaft Stopper M4WD-38/BL Black Collar by 3Racing  [M4WD-38/BL]

Aluminum shaft stopper designed for Mini 4WD maintenance

This M4WD-38/BL shaft stopper is a machined aluminum collar intended to replace common plastic retainers found on Tamiya Mini 4WD models. Its black anodized finish and precision profile focus on reliable seating and improved wear resistance without altering basic drivetrain geometry.

Where collectors and builders often swap brittle or compressed plastic parts, this metal stopper provides a more durable contact surface that stands up to repeated disassembly. The item is supplied as a single collar-style retainer and installs using the same mounting approach as the original plastic piece in most setups.

In service, the collar limits axial movement of wheel or gear shafts and gives a consistent seating face for bearings or bushings used on MA, MS, AR and similar performance chassis. It is well suited to routine replacement, restoration of vintage models, or any build that benefits from a tougher stopping surface.

Fit the part with standard hobby tools and avoid over-torquing small fasteners to prevent distortion of mating components. This stopper does not change gear ratios or motor specs; retain your normal setup procedures for the chassis in use.