You may want to post in General Truck Talk as well, more traffic. Power King is a Sigma brand. Which tire are you referring to? Check out page
14 & 15 . All I see are 14", 15", 16", and 20" in the aggressive treads. I found a 17" road tire
here. I run a very similar 7.5x16" Dayton aggressive tread in the rear and some cheap Chinese steers up front. No complaints other than the flat spots after sitting a while.
Nice pictures of your truck!
~Kyle