Tank wheel for use with tracks

This was a larger wheel that interfaces with the wide tank track. It has most of the axle as part of the model. The axle size is made to fit onto a roller blade bearing. The small hole in the tip of the axle should be drilled out to accommodate whatever drive mechanism you want. In my case, I used a Tamiya gearbox from ebay. I drilled the center out to about 3.1mm and pressed it onto the gearbox shafts. The arduino drives a H bridge shield. 5v is more than enough to power the motors and