Tamiya Mini 4WD Adjustable Cuboid Weight 9g - M4WD-39/LB by 3Racing  [M4WD-39/LB]

Mini 4WD cuboid mass M4WD-39/LB by 3Racing

The M4WD-39/LB is a compact rectangular 9g mass finished in light blue, offered by 3Racing for Tamiya Mini 4WD cars. It functions as a static ballast for builders who want precise mass placement on compatible performance chassis. This is a passive weight, intended for predictable additions to a car's static mass rather than for active damping applications.

Compatibility and mounting depend on your chassis and any aftermarket hardware. Model builders typically reserve a low-profile block for areas where it can be fastened without clashing with rollers, transmission parts, or body panels. It pairs well with standard accessory holes and universal mass-damper fittings able to accept a small rectangular block.

The light blue finish is useful for visible mounting positions and complements many custom paint schemes. As with any added mass, confirm clearance and secure fastening before track running; consider this product a trimming tool for balance rather than a performance retrofit for regulated events.