This 12V DC 28BYJ-48 Stepper Motor is small, inexpensive and high-quality geared step motor. The 28BYJ-48 Stepper Motor and ULN2003 Stepper Motor Driver is a widely popular combination of the stepper motor and stepper driver, because of the stability and reliability of the system.
With this car platform, add some micro-controller (such as Arduino) and sensor modules, and program it. Then you make your own robot car. Mechanical structure is simple, very easy to install.The car comes with tachometer encoder.
It is adjustable RC rocker for RC planes servo motors. Aluminum Hole centers at 20 and 24mm from the servo output 25T spine for RC Plane. It includes two steel bolt to secure the split clamp onto servo output.