Looking for some opinions. I searched, but didn't find any definitive/semi-definitive answers.
With two different sets of wheels, both with new(er) tires, I get a good amount of vibration through the steering column between 70-80 mph. It's enough vibration to shake the front passenger seat. I also get a very similar vibration when braking hard.
Given that it's happening with two different sets of wheels/tires, I'm disinclined to think it's a balancing issue or a bent wheel. And because the tires are brand new on one set of wheels, I don't think it's a treadwear/cupping issue (however I will check). Could it be a warped rotor?
Any suggestions on what to look for would be appreciated.
Edit: No spacers, stock suspension.