19mm ringless aluminium ball-race roller M4WD-32/GO technical upgrade by 3Racing  [M4WD-32/GO]

M4WD-32/GO is a 19mm ringless aluminium ball-race roller engineered for compact Mini 4WD applications. The ringless circumference reduces radial protrusion to lower guide interference while the aluminium barrel increases structural stiffness compared with polymer housings. Internal ball elements are employed to reduce bearing friction and improve rotational consistency under load.

Mounting follows standard 19mm roller spacing. Use the correct 3mm or 4mm shaft and calibrate spacer stack to achieve correct axial preload without binding. The part is intended as an aftermarket upgrade for chassis types that accept 19mm rollers, including MA, MS, AR, FM-A and Super-II, and is suited to tuned setups where minimal lateral profile is required.

Gold anodising provides a uniform hard finish that resists surface marking in display or competition use. This component is supplied as the roller assembly only; no drivetrain or chassis items are included.