The Tamiya 15289 JR RC 8T Pinion Gear Set provides a simple way to refine drivetrain response on Mini 4WD models. With a single metal pinion for strength and several plastic counterparts for tuning, it suits hobbyists who swap gearing for different circuits.
The metal pinion is made to clamp onto common motor shafts and helps prevent backlash and tooth skipping. The inclusion of multiple plastic pinions supports quick experimentation with gear meshes and ratio changes during practice sessions.
Using this gear set will help deliver cleaner power transfer and more repeatable lap times by improving gear alignment and reducing inconsistent slippage. Keep your pinions free of grit and re-check mesh after a few runs to maintain peak performance.
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