19mm Ringless Aluminium Ball Race Roller for Mini 4WD M4WD-40/PK by 3Racing  [M4WD-40/PK]

19mm ringless aluminium roller in pink finish

The M4WD-40/PK is a 19mm ringless aluminium ball race roller crafted as a low-mass option for Mini 4WD layouts. The pink anodised surface provides a consistent look while the ringless layout lowers mass at the roller edge and keeps compact dimensions.

This component is intended for experienced hobbyists who control clearance and balance across the chassis. It is aimed at mounting points that accept 19mm rollers; always check bearing inner diameter and axle hardware compatibility before installing. The anodised aluminium will resist basic wear but will mark if it scrubs against coarse track guides or rails.

Simple maintenance includes verifying bearing seating and checking shaft runout when swapping rollers. The part suits both display-oriented builds and tuners who catalogue lightweight components for performance adjustments.