I replaced my x4 stock tires with tusk terrabite's 27x9-12 front and 27x11-12 rears. The installer filled them to 30-32 psi so I dropped the pressure to factory specs 16 psi rear and 15 psi front, installed them, didn't test drive, and the machine has set still in my garage for 8 days. I was able to take it for spin today and right off the bat I noticed a pretty bad tire hop. I drove around on pavement for 7 miles miles or so and the hop diminished some but was still very noticeable at slow speeds. I hope being winter and the tires being cold they may have developed a flat spot from setting and not a defect The hop feels like it's in only one tire. Any ideas or input is appreciated!