19mm Ringless Precision Aluminium Race Roller M4WD-40/GO by 3Racing  [M4WD-40/GO]

Tamiya Mini 4WD 19mm Aluminum Ball -Race Rollers ( Ringless-Light weight ) -Gold - 3RACING M4WD-40/GO
Price:
USD$6.30
Brand:
3Racing
Model:
M4WD-40/GO
Condition:
Brand New
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Technical summary of the 19mm ringless race roller M4WD-40/GO

The 19mm aluminium ball race roller M4WD-40/GO is presented as a ringless, lightweight roller with an anodized gold finish, intended for Mini 4WD applications where reduced rotating mass is desired. The design uses an aluminium outer body and an internal ball arrangement, omitting an external retaining ring to lower inertia while preserving the guiding function on standard mounts.

Compatibility is geared toward common Mini 4WD roller positions found on Super-II, MA and AR platforms, but precise fit depends on post diameter and spacer configuration for each stay. The ringless profile modifies the roller profile that meets guard plates and low-friction tape, so dimensional checks are recommended prior to competitive fitting.

For installation and setup consider axle spacing tolerances, shim thickness selection and matching roller width to front or rear stays. The reduction in rotating mass will affect inertial response relative to ringed rollers, so tuning of lateral play and spacer stacks is advised to achieve consistent behaviour.

The component uses an anodized aluminium finish for surface protection and appearance. Confirm washer, bearing and screw compatibility with your existing parts to ensure correct assembly and secure mounting.

What dimensional checks should I perform before fitting?

Measure the stay post diameter, roller width and available guard plate clearance. Verify spacer stack thickness so lateral play is within your tuning targets.

How does the absence of an outer ring influence rotational inertia?

Removing the outer ring reduces mass at the roller perimeter, lowering rotational inertia and enabling faster spin-up of the roller assembly with minimal change to lateral guidance if setup is correct.

Are there recommended shim strategies for ringless rollers?

Start with your standard shim stack, then trim or add thin shims to prevent tape or guard plate contact while maintaining slight lateral play; small incremental changes yield the best results.

What should I inspect during maintenance?

Check bearing smoothness, spacer wear and the anodize surface. Re-lubricate bearings as needed and replace worn spacers to keep repeatable performance.

Does the finish affect friction with tape or guards?

The anodized surface is hard and smooth, but contact geometry rather than finish usually governs friction with tape or guard plates; ensure proper spacing to avoid unwanted contact.