Which wheel bearing is bad? Something else?

Based on the symptoms you described, such as a loud knocking or rumbling noise that increases with speed and turns, it is highly likely that you have a damaged wheel bearing. However, it is always advisable to get a professional diagnosis from a trusted mechanic or technician to confirm the problem. They can inspect the vehicle, take your description into account, and pinpoint the exact issue, whether it's indeed a faulty wheel bearing or something else altogether.