I"ve been following this thread and have been hesitant to jump in, but before anyone does this, know this. One should never replace tires on a vehicle with a tire in a lesser load range. As many of you know, I have upsized my tires and kept the stock wheels, but, before I did anything, I made sure the load range was the same or higher. Here, that isn't the case:
Load range (XL tires)
Stock 225/40/19 = 1,433 lbs, Load Range 93Y
OPs 235/30/20 = 1,135 lbs, Load Range 88Y
Stock 255/35/19 = 1,565 lbs, Load Range 96Y
OPs 255/30/20 = 1,389 lbs, Load Range 92Y
That to me is a huge difference, and I'm not even mentioning the OD stagger. Just Food For Thought.