Technical 19mm ringless aluminium ball race roller M4WD-40/RE red spare roller by 3Racing  [M4WD-40/RE]

Tamiya Mini 4WD 19mm Aluminum Ball -Race Rollers ( Ringless-Light weight ) -Red - 3RACING M4WD-40/RE
Price:
USD$6.30
Brand:
3Racing
Model:
M4WD-40/RE
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M4WD-40/RE technical overview

The M4WD-40/RE spare roller is a 19mm ringless aluminium ball race roller finished in red. Machined aluminium construction reduces assembly mass and the ringless profile offers a lower rotating weight compared with ringed rollers. The part is supplied as a 19mm replacement unit for applications calling for that diameter.

Compatibility requires a mounting arrangement that accepts a 19mm roller; verify axle bore, spacer stack and bracket clearances before fitting. The roller can be used on chassis families such as MA, MS, AR and FM-A where the physical interface is compatible.

Note for builders: the listing emphasises material and form factor, not sealed bearing service details. Installation follows standard 19mm roller procedures and typically uses existing axle pins and spacers from the build.

What measurements confirm compatibility?

Confirm roller outer diameter (19mm), axle bore diameter, spacer thickness and bracket clearance. Matching these ensures mechanical compatibility with your chassis.

Does the ringless design change stabiliser contact?

Ringless rollers have a slimmer profile which can affect stabiliser contact points. Review your stabiliser geometry and clearance to avoid unintended rubbing or loss of contact surface.

Are bearing internals specified?

The listing does not provide bearing service or sealing specifications. Treat the roller as a factory-assembled spare and assume no routine user bearing rebuild instructions are provided.

What should I check during installation?

Check axle straightness, spacer stack alignment and bracket clearances. Ensure the roller spins freely without axial play and that fasteners are torqued to appropriate hand-tight levels for Mini 4WD assemblies.

Is surface finish relevant for display builds?

Yes. Colour consistency and machining marks affect display aesthetics. Choose this red anodised finish when visual matching is required for a show or display model.