Robot Kits Programmable Omni:bit Smart Robot Car with Mecanum Wheel
58mm Omni Wheel for Lego NXT / EV3
Amazon | UniHobby H14135 58mm omnidirectional wheel Plastic omni wheels for arduino robot kit LEGO NXT and Servo Motor with Plastic Universal Hubs by UniHobby | おもちゃ | おもちゃ
Mecanum Wheels - Page 2 - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
LEGO MOC Omni-Wheel-II by kueden | Rebrickable - Build with LEGO