These omnidirectional wheels are used in all Duckiebot models:
Metal wheel: is compatible with Duckiebot models from DB17-DB21-J-v2. Offers two points of contact with the chassis.
Plastic wheel: is compatible with DB21J-v3 chassis and newer models only. Offers three points of contact with the chassis for improved rigidity over the previous model, and can be opened and cleaned, increasing its lifespan.
