Mini 4WD Precision Shaft Stopper Red - M4WD-38/RE by 3Racing  [M4WD-38/RE]

Technical overview of the M4WD-38/RE shaft stopper

The M4WD-38/RE is a single-piece anodised aluminium shaft stopper intended as an aftermarket locator for Mini 4WD drivetrains. Its compact geometry provides a seating face to locate axle shoulders in common 4WD assemblies, and the red anodised finish reduces bare-metal exposure while offering a consistent visual match with other aluminium upgrades.

Compatibility and fit: this stopper is compatible with Tamiya-style Mini 4WD axles when the axle diameter and shoulder location align with the stopper bore and seating length. Confirm axle gauge, shoulder offset, and nearby roller or bearing positions prior to installation to ensure accurate seating without interference.

Installation and adjustment: fit the stopper against the axle shoulder and retain it using the chassis retention approach already present (clip, nut, or press-fit). For modified axles, minimal material removal or fine alignment may be necessary; avoid heavy press-fitting to prevent shaft deformation.

Service considerations: anodised aluminium offers basic corrosion and wear protection but will exhibit surface marks under abrasive contact. Regular inspection of the seating surface and cleaning of track residue will help maintain secure axial location; replace the stopper if the seating face shows deformation that permits axial play.