What's the love child of the Customizable MakerBelt and Emmet's Gear Bearing? A fully printable tank tread assembly! It's not only fully printed (no screws or bolts) it's printed assembled, ready to use! Note that the belt is printed in place around toothed bearings, and the bearings are printed in place attached to a frame. Just remove from the build plate, rotate the belt and bearing pieces to make sure everything's free, and it should roll! How cool is that!