Wheel imbalance vs. disc impact

Hello, I’ve been having the problem since about a week that the steering wheel trembles more easily while driving and when braking, in an area of 120-140km/h. I recently got new tyres as well as the brakes (both about 8,000km on top), which is why theoretically an imbalance on the wheel or a disc hit of the brake disc could be considered. I also did a driving safety training with the vehicle a week ago including several full brakes. today I measured with a measuring clock, the left one has max. 0.01mm side stroke, the right one has max. 0.03mm side stroke, which is actually still in tolerance. When I made the brakes both 0.01mm. I did not have the wheels tested yet, I wanted to replace the tyres from the front to the back for the test, but then I will only come next weekend. What is your guess? My consideration would have to be a side impact on the windows. make every speed noticeable, or what are your experiences?