This M6.4 x 1.7 ball bearing spacer from 3Racing is a small-format accessory intended for Tamiya Mini 4WD applications. It is a single-dimension spacer designed to sit between bearing faces or between a bearing and a hub to establish a consistent axle offset. The gold descriptor refers to the visible finish; do not assume material beyond that finish.
Experienced builders will recognize its role in stack assemblies where precise spacing affects axle alignment and bearing preload. The part is limited in function to spacing and should be treated as a visual and dimensional accessory rather than a load-bearing upgrade. Check fitment against your existing bearings and hubs before use.
Compatibility notes: intended for Mini 4WD bearing and axle assemblies that accept M6.4 outer diameter spacing. Confirm internal clearances where wheel hubs, rollers, or chassis rails run close to spacer stacks.
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