This wheel is designed specifically for use with FS90R micro continuous rotation servos from FEETECH (formerly known as Fitec), and the combination can serve as a small, inexpensive, and easy-to-control drive system for a miniature robot. The wheel presses onto the servo spline just like a typical servo horn, and the small screw included with the FS90R accessory pack for mounting servo horns should be used to hold the wheel in place.
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