Racing setup double aluminium rollers 8-9mm M4WD-33/LB by 3Racing  [M4WD-33/LB]

Tamiya Mini 4WD Double Aluminum Rollers ( 8-9mm )(Light blue) - 3RACING M4WD-33/LB
Price:
USD$7.50
Brand:
3Racing
Model:
M4WD-33/LB
Condition:
Brand New
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Precision double rollers M4WD-33/LB for 8-9mm shaft centres

This double roller set is a machined aluminium aftermarket option for Mini 4WD applications. Components are finished in anodised light blue and the description targets fitment, spacer geometry and handling notes relevant to tuning on platforms such as Super-II, MA and MS.

Designed for 8-9mm mounting spacing; confirm shaft length and spacer stacks against your chosen stay or damper configuration. The anodised coating helps resist surface abrasion relative to untreated aluminium, and consistent machining tolerances promote repeatable concentricity when installed with the correct shims and bearings. Use these rollers where metal hardware is appropriate and avoid mixing into Wild Mini or Scale Mini configurations where they are not intended.

This product is supply-level hardware intended for hobbyists who verify thread sizes and spacer combinations prior to final assembly. Check vendor notes for included bearings or bushings and pair with compatible internal bearings if required.

What tolerances should I check before installing?

Verify shaft runout, spacer stack thickness and bore clearance. Ensure the roller bore aligns concentrically with the shaft and that any bearing press fit does not induce preload.

Which bearing ID is commonly used with these rollers?

If bearings are not supplied, internal bearings with 2.3mm or 3mm ID are typical choices depending on your shaft size and spacer arrangement. Match bearing width to prevent lateral play.

How does added mass influence corner behaviour?

Aluminium increases rotational mass and can alter inertia through corners. Tuners often offset this by adjusting mass distribution, ride height or friction-reducing components to retain optimal lap times.

Recommended maintenance for anodised rollers?

Clean with isopropyl alcohol and a soft brush, inspect bores for wear and replace rollers showing bore ovality. Avoid abrasive compounds that damage the anodised layer.

Are these intended as a performance upgrade?

They are supply-level aluminium rollers that provide durable hardware and consistent fit; they should be treated as part of a tuned setup rather than a guaranteed performance upgrade on every chassis configuration.