[rotorwrench]

Bear alignment shops always used dynamic balance procedures back in the day. They were an old analog system that still used a strobe to get the cock angle of the imbalance. There aren't as many of these shops left now days. Modern dynamic balancers like the Hofmann SD10 Finish Balancers are out there and also Bee Line Smart Balancer equipment. The later ones are digital electronic so this is more likely what good alignment shops use to check the complete dynamic rotor of the wheel and hub assembly on the vehicle. This is the only way to check them on a problematic vehicle. Just checking the tire leaves a lot of unknown possible imbalance if the rotor, drum, or hub is out of balance. An alignment shop that doesn't have dynamic balance equipment may not be able to solve problems like ones that are mentioned here.