Mini 4WD 9mm Aluminum Ringless Race Roller M4WD-29/GO by 3Racing  [M4WD-29/GO]

9mm aluminium ringless roller M4WD-29/GO in gold

This 9mm aluminium ball ringless race roller is supplied as a spare for 1/32 Mini 4WD models. It uses a ringless bearing layout inside an aluminium sleeve, so the description concentrates on fitment, material selection, and routine care rather than making performance claims.

Hobbyists will recognise this roller as intended for standard Mini 4WD assemblies where compact 9mm rollers are required. Because it relies on a ringless bearing design, installers should check axle retention and lateral clearance carefully during fitting. The aluminium shell delivers a blend of rigidity and low mass typical of aftermarket mini rollers.

Compatibility notes: the 9mm roller suits many tuning-focused chassis platforms that accept small rollers, including MA, MS, AR, FM-A, Super-II and VS types when 9mm positions are permitted. Do not assume fitment on Wild Mini 4WD or Scale Mini 4WD series without checking the specific design constraints.

Maintenance: keep the ringless bearing clear of grit and use a minimal amount of light oil if bearing smoothness drops. Check axle seating and spacer thickness when swapping from factory rollers to preserve intended clearance and chassis alignment.