4 Inch Wheel (FRC)

4 inch wheel designed to be similar to those provided for the FRC competition, but designed to be easily 3D printable. OD = 4", 16 tread lugs, fits on 1/2" hex shaft. Hex hole may need to be modified if it is too snug on the shaft
Can either be printed in-place with a dual extruder printer, or separately, though the fit may be awkward to assemble. Some adhesive may be required to hold the tread on to the hub. The tread should be printed with flexible filament at 40%+ infill, depending on how firm you want it to be. The Hub should be printed with PLA or ABS with at least 60% infill. More will be stronger.

Designed on Fusion 360
Link to file - http://a360.co/2mxmjjk