A used Servo Motor with an attached encoder. High Torque motor with 18 inch wire 200 Steps per Rev.
This is a small tracked robot equipped with 42mm motors, a motor controller, and Spektrum remote control. Don't let its size fool you. This is a rugged little robot.
These large Tiller Traction Lug wheels are 13" in diameter. They come as pair and have steel 5/8" diameter shafts and bearings.