I'm right there with you. Mine stick out almost 4". According to the guy at the inspection station in VA that I go to, four inches is the maximum so I barely make it. He did warn me though that a cop could still ticket me even though it passed the Safety Inspection. The one thing I was never able to determine is if the 4" is measured at the edge of the tread or the outermost part of the tire (my sidewalls are almost an inch farther out).
All that said though, NH could be different. You'll have to check with somebody who knows the laws for your state.
I find my rooster tails entertaining (even if the drivers around me don't)![]()