We recommend using the M4 steel mounting screw to mount IG42 motors.
This is an Enclosed 4-wheel drive remote control robot kit. It uses four powerful wheelchair motors and the inside robot cavity has plenty of room for electronics.
This is a MLT-JR tracked robot platform and is equipped with 32mm motors, a motor controller, and Spektrum remote control. Robot chassis painted with Tactical Tan bed-liner. Robot handles up to 5lbs of additional payload, travels up to 78 fpm.