This will be an optional rotor for Racing Performer M3 series motors that enables you to adjust the energy feeling in accordance with race laws. With a magnet outer diameter of 12.3mm and inner diameter of 7.25mm, it uses a high-power magnet that achieves overwhelming acceleration and top speed, giving you a bonus in events. No matter if the magnetic force is lost due to high conditions, you'll refresh the engine power by changing the rotor! It is possible to regain your initial energy and feeling.
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