You allmost answered your own question. Id say take a look at those brake rotors. See what your pad life is then measure your rotors for thickness. Do it in four spots. Yeah could be your tires as well. Jack that front end up to. Look over those tie rod ends. Check to see if any play is in them. Also wheel bearings one could be going bad now. And ball joints.Just like the title says. When I go above 70 in my 99 saturn sc1, my steering wheel starts to shake and gets worse as my speed goes up. Before it would only shake as I was breaking from highway speeds. Any ideas?
You got your work cut out for you. Now Go check this stuff out.