The Tamiya 53320 Lightweight Gear Shaft Set is a sensible upgrade for Boy's 4WD cars where trimming rotating mass is the goal. It is aimed at enthusiasts who want a practical, low-effort performance improvement.
By lowering rotational mass, these shafts help the drivetrain react faster to throttle inputs, often improving acceleration feel and mid-corner response. They are a tidy way to sharpen handling without changing gearing.
Designed to suit many Boy's 4WD models, the set works as a direct replacement in common configurations. Confirm fitment against your model specs to ensure a seamless swap.
Fitting is straightforward for anyone familiar with basic RC maintenance. Use the usual toolkit, apply light lubricant where recommended, and verify smooth operation after installation to extend part life.
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