Tire size choice

First off. Wondering if I should go up from a 16"wheel to a 17"?

My truck is a daily driver. Its also a 2.7, I want to keep my mpg as high as possible. The truck has 4.30 gears and a 5spd. Wondering if I should go 255/85 (33.3) or 255/75r17(32).
Debating on:
Duratracs-32" 43lbs 255/75
Bfg km1-32.50 47lbs 255/75
Cooper st-33.3 47lbs 255/85
I hit trails maybe once a month if that. I tow a trailer, around 1500lbs every other week. Any help?

 

bfg, 255/75/17 mud. they were rubicon jeep take offs, brand new for cheap.
very happy how they ride.

 

I'm wanting light weight to. Duratracs are 44lbs and those are 47. Which it doesn't sound like much now that I think about it. So you think I should go with 17"wheels?

 

sorry, iam no expert, had my Tacoma for only 8months , it had 275/55/20 bfg rugged terrain. it was riding like a rock ,felt every bumps, cracks in the road.
but with the 255/75/17 they`re a lot softer,. also went with my budget,.

 

Oh, ok. I'll probably end up getting 17s in a year or so.

 

How do those tires do? Mud, grass, pavement.

 

so far they`re great. and am not an agressive driver, so they should last

 

Any one else want to help me? Really like the sound of being on 33s but like the weight of 32s. 4.30s are kind of annoying on highway with high rpms