When I take my daily drivers in for tire balance/rotate, I specify a "road force" or "load force" balance. Not all tire shops have the equipment for that type of balance, and it's a higher price per tire. It simulates a loaded tire on the balance machine verses the common high speed spin balance. That may be a simple solution.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy