Wheel / Rubber Car Tire Toy / Robot Part for DIY /

It is not designed for 3D print ... but you can try it :)

Sketch of this:
http://www.ebay.com/itm/400902067018?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Features:
Diameter: approx. 29mm
Width: approx. 5mm
Aperature: approx. 3.9mm suit to 4mm axle