how low can i go without losing my bed space

look and load as well as ride this 19.5 wheel and tire ride like shit

I would probably try to sale the 19.5s and look into some other wheels.

for tire reasons??

Yeah and also if you want your truck to set lower it will be alot less headache if you had smaller tires.

sounds like thats what ill need to do ,
bags in thef ront and back ,maybe a little mod on the bed, either cut outs and re cover or lift the wheel well,
id like 19 or 20 " rims and a solid tire that can hold the weight of a 12k trailer set up

Looks like you are going to need some 19s then because there are no 20s in dually wheels except for wires. A 245/45/19 tire will do everything towing wise you want it to.

ok i bite, drop some names of co's that build 19's, so i can ck'em out

brentzwheels.com is your best bet

Alcoa makes 19.5s that I can mill to a 19, Brentzwheels, I think American Eagle makes some 19s, and I am sure there are some others.

I also sale a direct bolt 19 that is just a plain 8 hole design.

are they the rims on your truck?