[cbreez]

Well Dave, we are talking tire pressures here, not about my car... I don't believe that my feelings towards the manufacturer come into play here, so why bring it up?
On this particular subject, it really doesn't matter what you drive...
Tire pressures are a very simple thing, and it's kind of funny to see how they have been complicated by what "seems" to be right for one person. Each tire made has a recommended pressure, that will affect it's footprint and the ultimate spring rate of the car. The will be several lbs. of tolerance on either side of that pressure. If you get rid of a shimmy by using tire pressure, you are masking the real problem, which is likely something bent or loose in the suspension. Today's manufacturing tolerances and techniques do not likely produce unround tires and wheels, though all need balancing. If your wheels and tires are balanced, and you have a shake or shimmy when you drive, there IS another problem. I do talk from years of experience, not some info I just Googled off the internet. I love to hear the "experts" use terms like..."it seems to", "they tend to", and similar expressions. Sorry, that's not convincing enough to me.
Man, you have to stick with the basics of physics to make intelligent choices...but it's really simple!
BTW, I do have 15" wheels, that run at 32-35 lbs of air, smooth as silk. All this talk that 17's are better than 15's is just hype.