Yes, the tires need to be properly balanced as the drums of the drum brake system are not balanced. So, the Centramatic's real job is to "balance the drums" with any changes in the tire balance over time.
I installed them on my Honda GoldWing motorcycle and never pay to balance these smaller tires and wheels any more as the Centramatic balancers keep them in perfect balance as the tire wears.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels