The Tamiya 15393 JR Steel Bearing set is a compact upgrade for hobbyists aiming to refine their Mini 4WD. Each 620-sized bearing features a fluorine finish that reduces drag and enhances longevity, useful when tuning for race conditions.
These bearings are made to fit standard Mini 4WD wheel hubs and axles. They are compatible with MS, MA, AR and similar chassis, making them easy to incorporate into many existing builds without major modification.
Replacing conventional bushings with fluorine-coated steel bearings produces smoother wheel movement and better stability. This is especially valuable in fast sections and technical corners where control and repeatable performance matter.
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