Omni-directional wheels in the smallest diameter offered by any common FIRST Robotics Competition or FIRST Tech Challenge supplier.
These 50 mm / 2 inch omni wheels feature multiple durometers:
They also have a standard 14 mm Hex Bore, letting you choose between 4 different bores:
These 50 mm / 2 inch omni wheels features two different durometers:
They also have a standard 14 mm Hex Bore, letting you choose between 3 different bores:
Stack several of these wheels on a shaft to craft an unstoppable intake system for your robot that can be used to center game pieces.