Hiwonder Mecanum Wheel 60mm High Omnidirectional Hardness Plastic Wheel for Robot Car DIYDescription Mecanum wheel uses high quality rubber, big friction force, smooth tire operation process The latest mecanum wheels for omnidirectional movement and allow your robotics to not only travel forward and backward, but also side to side. Perfect for tight spaces This robot Mecanum wheel is compatible with building blocks and TT motors Cool black wheel shape contributes to project outlook The packing includes 2 left and 2 right 64. 5mm mecanum