Mini 4WD Low-Profile 19mm Ringless Aluminium Roller M4WD-40/LB by 3Racing  [M4WD-40/LB]

3Racing M4WD-40/LB 19mm ringless aluminium race roller in light blue

The 3Racing M4WD-40/LB is a 19mm ringless aluminium ball race roller supplied in a light blue finish. Its ringless profile keeps the total diameter small so it sits closer to guides and minimises snag points on race tracks.

Before fitting, check post bore diameter, axle spacing and mounting angle to ensure the roller aligns correctly with guide rails. Test any bearing and spacer combinations to control endplay and avoid lateral drift.

Review clearance on MA, MS, AR, FM-A, VS and Super-II style platforms when choosing mounting locations. The absence of an outer ring alters contact behaviour against bumpers and guide edges, so adapt spacer stacks to match your chassis geometry.

Confirm packaging details and part colour before committing the item to a race or display build.