Mini 4WD Ringless 19mm Aluminum Ball Roller M4WD-40/LB by 3Racing  [M4WD-40/LB]

3Racing M4WD-40/LB 19mm ringless aluminum roller (light blue)

This 3Racing M4WD-40/LB is a 19mm ringless aluminum ball race roller finished in light blue. The ringless layout reduces the outer profile and is intended as a compact replacement roller for racers wanting minimal obstruction around guide rails.

Hobbyists should check axle spacing, post diameter and mounting orientation before fitting to ensure correct seating. Evaluate bearing or spacer stackup to control axial play and avoid binding on guide surfaces.

Confirm clearance on MA, MS, AR, FM-A, VS, or Super-II style chassis when planning positions. The ringless outer surface interacts differently with bumpers and rails, so choose spacer combinations that match your existing roller geometry.

Packaging and labelling reflect seller designation; verify colour and quantity prior to swapping into a race setup or display build.