Time to install tires on my truck camper setup

I had 19.5 wheels in my F450 and was carrying 10,000 lb forklifts on it.
You have more rubber choices with 19.5 size and good brands will last 100k miles, when $120 tires still delivered 60k.
You will loose comfort and traction with those tires, but that in lousy on pickups to start with.