are a pretty aggressive off brand 30x9.50 tire. They are noisy and although pretty aggressive, I am thinking I want more of a less aggressive snow-specific tire since most of my winter driving will be on highways and occasional off-road situations. I was looking in the local paper and found a killer deal on some Nokian Hakkapelitta snow tires, but the tire size is 185/65/15 - a bit smaller than the recommended size for the Montero. Is their any disadvantage to going a little smaller in the winter? The general rule of thumb used to be narrower tires in the winter, and wider in the summer. Any insight?