The M6.4 x 1.7 spacer is supplied for Mini 4WD bearing stacks and hub assemblies. It establishes a fixed gap between bearing faces or between a bearing and a hub so axle offset is repeatable. The gold descriptor identifies the finish only and should not be interpreted as a material declaration.
Builders will find it useful in stack assemblies where accurate spacing influences axle geometry and bearing preload. It is a dimensional and aesthetic accessory rather than a heavy duty upgrade, so use it accordingly and check part compatibility before use.
Fit notes: intended for assemblies that accept an M6.4 outer diameter spacer. Verify internal clearances around wheel hubs, rollers, and chassis rails to prevent interference.
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