OP, I don't think it was a good idea to mix run flat with non run flat tires because they are not the same design and construction. There is no surprise the car and steering have not the same balance.
If you want the ultimate performance, you have to replace the 4 tires at the same time.
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2019 M240i, Melbourne Red, Black Interior. 3M Tint, Premium Package, Harman Kardon, Adaptive LED Head Lights, M Performance Exhaust and Diffuser, Chrome Exhaust Tips, 719M Bi Color Wheels, Black Kidney Grille, Burger Tuning JB+.
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