Yokomo YOKZCRA3615 3x6x1.5mm Aluminum Shim Collar Set 8pc Red  [YOKZCRA3615]

Precision aluminum shim collars

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.

Made from anodized aluminum, these collars provide a consistent, corrosion-resistant interface compared with plain steel washers, while keeping weight low. The red finish helps with visual identification when sorting parts during build or setup work.

Installation is straightforward when the mating component accepts a 3x6x1.5mm internal/external clearance: slide the collar onto the shaft or locate it between hub surfaces where a thin spacer is needed, then reassemble the related hardware. Use common workshop practice to verify fit and to avoid binding; if tightness is uncertain, check clearances with the original part removed before final assembly.

In tuning and setup, these shims are useful for small incremental changes—stacking one or more collars can alter track width, change bearing preload, or eliminate slight axial looseness without filing or modifying parts. Keep spare collars on hand as a low-cost way to experiment with small geometry adjustments during chassis setup.