The wheel has been around since the dawn of recorded history. The skid goes back even further. So long as there have been people who build things, people have built things that make moving other things easier.

To determine how large a motive drive-train you need, you must first decide how fast you want your vehicle to be. Choose a top speed in kilometers per hour. To find the power required for your desired speed, multiply the speed by itself, and then by the mass of your vehicle (in tonnes). Then divide by the suspension factor (SF) for your motive drive-train, as found on the table below.