Crack when steering after tyre change

Yesterday the tires changed. From 16 inches to 15 inches winter tires. On stage. Oil change and brake fluid change were also added. Car stands on the ground again and now it cracks when I hit the steering wheel by approx. 45 to 90 degrees to the left or right. But also not always. And if, then only at the stand! The steering gear is not 5000 km old and dense, cross handlebars and track rod heads exactly as old. On summer tires I also have nothing It doesn’t matter if the servo is running or not. Why this just occurred with the change of the tires is a mystery to me. The cross joint in the engine compartment is a sprayed, so not dry. I had taken the two rims at the front today again, not to notice any abnormalities. Maybe one of you had such a case or a case. a similar case.