Even well balanced tires will have a speed at which resonance amplifies minor balance and roundness effects in the tires, resonance modes in the suspension and steering, and there are also resonance speeds in the driveshaft. All of these make it hard to pin down the source of something that can be described as a slight vibration. Felt in the steering wheel, it is most likely front end, but other things can telegraph.
If it is a vibration, the out of balance is likely slight and can be hard to correct. A significant out of balance problem will be felt through floorboards, seat, jerking the steering wheel.
A lot of people like to fix tire and wheel balance with tire bead solutions. These do not so much correct the balance as they dampen the vibrations caused by the out of balance condition.