[Zeke]

Having worked in a tire shop in college days and an astute observer of famous Bonneville balancer Nate Jones, I know that the old fashioned balance on the car tire balancing is the ultimate system as a last step to prove that the rotating mass of brake rotor, hub., etc. are all in the equation. Before mounting the wheel ass'y Nate will use a dynamic balancer to distribute the weights on either side of the vertical weight centerline.

More important years ago than today, mounted tires are also shaved to perfect roundness. Also tires change shape at different speeds due to imbalance of the carcass itself, hence the road force method. However, spin up floor balancers for balancing on the car will catch that and shaving can help. It's a process that is well worth $50+ per wheel. You will save on tire wear that recovers your expense if you drive normally, not to mention wear on suspension.

Only if you can mount the tire vertically and find the offset weight centerline can you place weights on the inside and out to achieve dynamic balance. A bubble balancer can't do that and should be only used for things like trailer tires or to pre-balance if you want to go to the trouble.