Mecanum Wheels


 * http://www.instructables.com/id/Mecanum-Wheels/?ALLSTEPS
 * http://www.thingiverse.com/search?q=mecanum&sa=
 * http://www.thingiverse.com/thing:5206
 * Pour Lego Mindstorm NXT : http://www.thingiverse.com/thing:26005