Tank Track Wheels
Demo vehicle: http://steamcommunity.com/sharedfiles/filedetails/?id=1302162156
The wheels look 2x wide but only have collision 1x wide, and part A and B each have their collision on opposite sides. Place an (A) wheel directly on a bearing, then right after it place a bearing and a small pipe, and place a (B) wheel on the pipe. So you have an inner row of wheels that have a single space with small pipe between each one, which is what the outer row of wheels mount on. The way the models are, the wheels can look glitched into each other in order to hide the treads of the wheels inside of each other. It’s an attempt to look at least somewhat like a tank tread around the outside, since there’s no non-game-crippling way to do nice tank treads..