MA MS AR Mini 4WD Shaft Stopper M4WD-38/BL Aluminium Black Collar by 3Racing  [M4WD-38/BL]

Aluminium shaft stopper built for Mini 4WD service

The M4WD-38/BL is a single-piece aluminium shaft stopper meant as a drop-in alternative to common plastic retainers on Tamiya Mini 4WD machines. With a black anodised surface and a machined profile, it aims to improve durability while leaving drivetrain geometry unchanged.

Builders who regularly disassemble models for tuning or display prep will appreciate the metal collar's resistance to wear compared with plastic. The stopper mounts in the same location and with the same basic method as the original plastic component in most chassis arrangements.

Its role is to control axial play on axle and gear shafts while providing a consistent seating face for bearings or bushings on performance chassis such as MA, MS and AR. It is ideal for maintenance replacement, restoration work, or any application where repeated assembly demands a tougher contact surface.

Use standard hobby tools for installation, and avoid excessive torque on small fixings to protect mating parts. This component does not affect gear ratios or motor selection; maintain existing setup conventions for the chassis you are using.