This is a robot drive wheel we had made specifically for us. It does not have a bearing. It's 10 inches in diameter. 3" inches wide. Its Pneumatic with a 4 bolt pattern so you can easily mount it to a flanged hub.
This is a programmable autonomous robot prebuilt kit that can be controlled via USB gamepad. The MarvelMind IPS (Indoor Positioning System) provides indoor navigation. ODROID-XU4 single-board PC provides the most flexible platform possible.