These 13mm ringless aluminium ball race rollers are presented in Tamiya-compatible terms and intended as replacement detail rollers for Mini 4WD enthusiasts. The unit combines an aluminium sleeve with internal ball elements; the ringless profile reduces the outer edge diameter compared with ringed rollers, producing a neater contact silhouette on track guides.
Declared fitment is for Tamiya Mini 4WD style mounting points. The rollers feature a light blue anodised surface and are targeted at hobbyists who want an alternate aesthetic and a reduced contact edge while leaving chassis layout unchanged. The parts do not include external retaining rings and rely on common roller mounting hardware used on standard Mini 4WD chassis.
Installer tips: the ringless format changes the contact edge and can affect interaction with guard surfaces, so check clearance and orientation carefully during fitting. These are aftermarket accessories and may not be permitted where rules restrict nonstandard components.
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