It would be obvious when a non hub centric wheel is mounted to a balancer. Besides the obvious tire runout, the balancer will ask for 10oz or some huge number. Then you know to mount up the lug adapter. As for the drums, in most cases they are close to balanced anyhow and since they are a small diameter, a small imbalance wouldn't matter. Rims without tires are pretty close to 0 balance also. Besides, one of my drums has a small weight attached to it so someone balanced it. Do yourself, your camper and your bearings a favor and balance the tires. For heaven's sake it doesn't cost THAT much.
