The wheels are 4.5" in diameter and about 1 1/8" thick. There are two wheels included and they are modified to fit a splined servo shaft such as the Hitec standard servos. It includes 2 long screws for mounting the wheels on the servo shaft.
This robot is a prebuilt 2WD All Terrain Robot (ATR) designed and fabricated in North Carolina USA. This robot supports our IG42 planetary gear motors.
This is a direct drive 4WD robot kit that uses Nexus mecanum wheels. The mecanum wheels allow it to vector in any direction.