Mini 4WD Performance Cuboid Mass 9g - M4WD-39/LB by 3Racing  [M4WD-39/LB]

Tamiya Mini 4WD cuboid Weight 9g -Light Blue - 3RACING M4WD-39/LB
Price:
USD$3.80
Brand:
3Racing
Model:
M4WD-39/LB
Condition:
Brand New
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Technical overview of M4WD-39/LB cuboid mass

The M4WD-39/LB is a 9g rectangular mass block finished in light blue, engineered for predictable static ballast on Tamiya Mini 4WD platforms. 3Racing supplies this compact piece as a passive mass element to assist precise centre of mass adjustments during race setup and tuning. It is not an active damper but offers repeatable weight and consistent mounting dimensions for setup validation.

Installation depends on chassis geometry and auxiliary brackets; planners should verify mounting plane, clearance to rollers and drive components, and fastener torque. When used in a tuning program, document placement shifts and lap time effects to correlate mass distribution with handling response.

Surface finish and dimensional consistency are important for competitive runs and display rigs. The light blue coating provides visual consistency where weights are visible, and the small footprint helps retain low profile mounting without compromising body clearance.

What measurement checks should be made before fitting?

Measure block thickness, mounting hole spacing and clearance to rotating parts. Confirm that the chosen fastener length does not engage moving components or compress suspension mounts.

How to record setup changes when adding this mass?

Log the block position, mounting orientation, and total car mass before and after installation. Run controlled tests on the same track section to isolate the mass effect on corner entry and exit behaviour.

Are there recommended fastener specifications?

Use low-profile machine screws or purpose clamps sized for model hardware. Apply thread-lock where appropriate and torque to avoid stripping thin chassis sections.

Can multiple blocks be used for fine tuning?

Yes, small increments across several locations allow granular control of polar mass distribution. Ensure stacked or combined blocks do not breach body clearance or create interference with moving parts.

How should finish wear be managed for competition use?

Inspect contact points for abrasion after each event and replace or recoate if necessary to maintain consistent mass and appearance. Protect exposed screw heads with washers to reduce localized wear.