Duplo Tank Treads

thingiverse

These tank treads replace the wheels on the basic duplo chainable cars. I've included the SCAD file where I modeled the entire assembly, plus individual STL files for the wheel and the tread segment. It takes four wheels and 38 segments to make both treads, and the segments just snap together. Cura complained about overhang on the groove around the wheels, but I was able to print it without a problem. YMMV. The treads are pretty stiff to turn when you first assemble them, but they'll loosen up over time. They definitely work better rolling over a rug or something soft rather than hardwood, but my four year old doesn't seem to mind :) Have fun, and let me know how it goes!