I have seen some Infiniti g35‘s/Nissan Maxima‘s and I see any weights on the wheels. I was wondering how these wheels are balanced and if they use some sort of internal balancing system.
They just place the weights on the inner side of the wheel.
Stick on weights on the inside behind the spokes of the mag.
The wheel weights are attached on the back side of the rim, any other wheel can be balanced this way as well for rims that cant take weights on the outside or for appearance. No special machine, just different location of the weights.