Yes, even this design can be a FREE download once I am fully funded for my RoboGuts™ S.T.E.A.M. Education Program Kits;

IF each viewer donates just $5 I'll be funded almost overnight and then all my designs become FREE downloads!  

The fastest and cheapest way to get all my .STL files FREE is to donate $5 to help fund school materials ... once I have $3,500 I'll convert all these files to FREE downloads.   https://www.gofundme.com/roboguts-kits-lessons

This is a nice skinny BoeBot wheel for making a mars rover type looking BoeBot or other vehicle ... the hub ties to a servo motor. The extra rectangular bumps help to keep your rubberband tire ON and Centered. This is another of many entries to the makezine.com/go/makerbot contest ... blog.makezine.com/archive/2010/04/makerbot_giveaway.html The first pictures sent in from BG of some of my designs ... the wheel and servo brackets ... bottom left ... I guess I'm not too far off ... Instructions MakerBot four of these and convert your BoeBot to a rover ... If you successfully make this with a 3D printer please send me the build-file and machine type so it can be uploaded here for others to use.