This is a custom made 3D printed mecanum wheel designed to work with Lego Power Functions, NXT, and EV3.
IMPORTANT!!!!: you need 2 right and 2 left, and on your vehicle alternate left and right wheels, or it will not work at all!!!!!!!
Required parts list
12 Lego wheels and 6 Lego pins are required for each wheel.I suggest going to this website to find them:
Get 48 of the following:
LEGO Wheel Hub Ø11.2 x 8 with Centre Groove (42610) (each costs 10 cents)
LEGO Black Tire Ø 17.6 x 6.24 (42611 / 51011 / 92409) (each costs 3 cents)
Get 24 of the following:
LEGO Tan Long Pin with Slots and No Friction (32556) (each costs 3 cents)