I starting to get the pieces and part together for my robot. I am going to use a 4 wheel drive with each wheel having is own motor and gearhead attached to the wheel. Since speed in not going to be a question, I am going to use steering like on a tank or the mars rover just run the other wheel in a different direction. Since the robot will be mainly off road I need some help with a shock or strut assembly to keep the wheel on the ground. Any help in pointing me in the right direction will be welcome.