3Racing M4WD-03/PK M6.4 x 1.7 mm Mini 4WD 4WD ball bearing spacer (Pink) accessory for wheel bearings  [M4WD-03/PK]

3Racing M4WD-03/PK pink M6.4 x 1.7 ball bearing spacer for Mini 4WD

This spacer is a single-dimension accessory intended to locate and preload M6.4 x 1.7 ball bearings used in Mini 4WD wheel and axle assemblies. The pink anodized finish is a visual identifier rather than an indicator of different mechanical properties; material and tolerance data are not supplied by the vendor.

For experienced hobbyists: use these spacers where a fixed separation between bearing races is required, or to replace worn or missing factory spacers. Confirm internal bore and outer diameter compatibility with your existing bearings and hubs before installation. If a precise stack height is required, measure the assembled runout and axial clearance on a bench before reassembling onto a running chassis.

Compatibility note: intended for generic Mini 4WD bearing applications. Do not assume interchangeability with non-standard axle or hub designs without verification. This product is an accessory part and not a kit; it does not change chassis class or permitted modifications.