Brake scrubbers

Hello, have problems with my Lexus SC430, Bj 2006. When braking from 60 – 40 km/h relatively strong vibrating in the steering wheel??!!! you can literally feel the unrest in the front brakes/wheels, even after repeated repetition, when I only step slightly on the brake is little to nothing to feel, only with stronger braking this lack occurs. Wheel bearings are new tires as new, several times balanced, tyre pressure 2.5 bar all around brakes before 4000Km renewed and so-called “deadened” De r SC430 is known for its “sensitivity” on the front axle. What disturbs me is the vibration in this speed range from 60-40, whereby also light brake vibration occurs from 120 to 90, but not as strong as in the 60-40 range.