This 19mm aluminum ball race roller from 3Racing is presented as a ringless, lightweight option in gold finish intended for Mini 4WD use. The part is built around a 19mm diameter roller form with an aluminum body and internal ball arrangement described as ringless, a configuration aimed at reducing rotating mass while retaining lateral guidance on roller mounts.
The roller suits standard Mini 4WD chassis roller positions used on competitive platforms such as Super-II, MA, AR and other common 4WD layouts. Fitment depends on post diameter and spacer setup on each chassis; the ringless profile can affect how the roller interfaces with guard plates and low-friction tape during cornering, so confirm clearance before race use.
Installation considerations for experienced builders include axle spacing, shim selection, and matching roller width to your front or rear stay. The lightweight characteristic cited for this model can change inertial behaviour compared with thicker or ringed rollers; use it where reduced rotational mass is required without sacrificing basic guidance.
Materials and finish are consistent with aftermarket aluminum rollers: anodized gold surface for corrosion resistance and appearance. As with any small spare part, verify compatibility with your existing washers, bearings, and mounting screws prior to permanent assembly.
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