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

19mm ringless aluminium ball race roller, pink anodised

The M4WD-40/PK roller is a 19mm, ringless aluminium unit offered as a lightweight alternative for Mini 4WD chassis. Finished in pink anodising, it removes the outer flange to shave weight around the rolling surface while keeping a compact diameter.

Best suited to experienced builders who manage tight clearances, this roller is intended for positions accepting 19mm rollers; always confirm axle and bearing inner dimensions before installation. Anodised aluminium gives moderate resistance to surface wear but will show marks with heavy contact against abrasive guides or rails.

Maintain the roller by inspecting bearing seating and axle runout when swapping parts. It works as both a cosmetic match for display builds and a mass-saving option for tuning inventories.