TRF421X 3.0x4.0x2.7mm Shim for Precision Spacing - Tamiya 9803571  [9803571]

Micro 3.0x4.0x2.7mm spacer for tight tolerances

The Tamiya 9803571 spacer is an aftermarket hop-up intended to give precise spacing control in TRF421X-related assemblies. Shown with reference 42391, it is suitable where repeatable, small incremental adjustments are required, for example at bearing seats, linkage pivots, and chassis mounting points.

Use this spacer to address axial play, fine-tune gear mesh clearance, or tweak suspension geometry without replacing major components. The 3.0x4.0x2.7mm nominal dimension works well in confined areas typically found on touring car platforms.

Fitting is straightforward: make sure the spacer is oriented correctly, slide it onto the shaft or into the bore, and reassemble. Avoid excessive preload that can bind bearings; a light manual rotation check will confirm freedom of movement.

As part of a tuning toolkit, this spacer lets you make measured changes in stack height and thickness to influence roll behavior, toe link positions, and drivetrain engagement. Keep a log of adjustments and test gradually to judge handling impacts.