I have this problem right now. And it started when I rotated my tires a few weeks ago. And it's only between the speeds of about 50-55
I had the same problem after a rotation. It turned out to be a bad brake rotor. Was really strange because I had no pulsation when I braked due to a warped rotor.
My steering stabilizer started leaking and finally took a dump, I started to get wobble when I hit bumps. Changed it to a old man emu & all is well
Very strange. Wonder if wheels were torqued wrong or something and damaged the rotor.
Yup very strange indeed. Tried removing the rotor clips, a couple of different places tried balancing, rotated tires to see if was a bad rim. Drove with it for awhile, did a brake job, replaced rotors and pads, problem solved. PITA