Originally my 2006 G35X sedan had 4 matching tires. I work in an area that's under heavy construction. Low and behold, I got 2 flat tires in 4 days. Both on the right side. The rear had a nail in it that had been slowly leaking, and I kept topping it off and then it blew on the interstate as I was exiting. The front tire blew 4 days later. Since I have the car up for sale, I didn't want to put new tires on, so I went with used ones. Both tires have been balanced. But now there is a kind of a oscillating vibration that increases relative to vehicle speed, like something isn't perfectly round. Like a flat spot or an oval. It also pulls to the right now. The calipers don't seem to be dragging, because they are not smoking or hot. A used car check I had done a couple of months ago said front end bad bushings in lower control arm, and possible sway bar link and/or strut mount knock noise. What could be causing the vibration/pulling?

 

Sounds like an imbalanced tire.