This is a robot drive wheel we had made specifically for us. It does not have a bearing. Its 6 inches in diameter. 1.9" inches wide. Its a rubber pneumatic tube tire. The rim has a 4 bolt pattern so you can easily mount it to a flanged hub.
Ready to ship prebuilt tracked platform with DeWalt battery adapter. This lightweight platform uses IG42 122 RPM motors, all-terrain tracks, and an RC control system. Powered by standard DeWalt batteries for ease of use.