Yokomo YOKZCRA3615 Red Anodized 3x6x1.5mm Shim Collars 8pcs  [YOKZCRA3615]

Small spacers for fine tuning

This pack contains eight 3x6x1.5mm aluminum shims/collars in red manufactured by Yokomo, intended as small, precise spacers for hobby R/C models. The rings are intended to sit where a thin, rigid shim is required to correct wheel spacing, centre an axle, or take up a small amount of lateral play in assemblies that accept a 3x6x1.5mm washer-style part.

Anodized aluminum gives a uniform, corrosion-resistant surface compared with plain steel washers and helps keep added mass to a minimum. The red colour aids quick identification when sorting parts during builds and setup work.

To fit, slide the collar over a shaft or position it between hub faces where a thin spacer is necessary, then reassemble the related hardware. Check clearances and rotate the assembly to ensure there is no binding; trial-fit without final fasteners if needed to confirm proper fit.

In practice, these collars are ideal for incremental setup changes—stack collars to subtly adjust track width, tweak bearing preload, or remove small axial play without altering major components. Carry extra collars to enable quick on-the-fly geometry tests.