Unbalance from 100km/h

Hello! So, again summer tires on it and the fun starts. I have an imbalance from about 100 km/h, so the handlebar flickers. At 120 it is the worst, at about 140 it is almost gone again, but not quite. Wheels have now been selected 3 times, but nothing helped so properly. There are original KIA-Alu rims 6J 15, with 205/60R 15 tires on it (Dunlop SP-Sport). The strange thing is that it is not always. On some roads it is stronger, on some roads almost not at all???? It can’t be over, WR back on it and rest is… what else can that be? If a fine balance on the car would do anything?