You mean they are now new tyres ? i.e. no strange wear ?

I had a similar thing on my merc and changed

front discs
rear discs
front wheel bearings
anti roll bar links
lower ball joints
had tracking done

then............. noticed the two front tyres were worn on the inside, changed them and job done

Was nieve to it as I couldn't see how tyre wear alone would give the car the shakes.