Larger Tires rolling resistance vs final drive ratio?

I'm hoping somebody can help me pick out a set of tires. My turd gen is lifted about 2.75"s. I'm still rolling around on factory rubber because I've been using it to pull a small travel trailer and don't want to put excessive stress on the drive train. The truck does great as is pulling. It's 4x4 OR and the stock rubber has gotten me everywhere I need to go offroad, so if I decide to get new meats it will pretty much be for cosmetic reasons.

I have a pretty good understanding of how taller tires affect final drive ratio which can "rob" torque at low RPMs. I'm hoping somebody can help shed some light on how other factors such as the rotational mass and rolling resistance compare to the affects that the overall diameter of the tire has?

I don't plan on re-gearing.

Ive done a little research and am considering 255 85r16 tires that have a max inflation psi of 80. My understanding even though they are taller ( which will have a negative impact on Towing) they are narrower and since they have the option of being inflated to 80 psi they should have a smaller contact patch and less rolling resistance? (Potentially positive impact on Towing)

 

The larger diameter of that tire will have a negative impact on towing.

 

Thanks sorry maybe I should be more clear.
I underside that my towing performance
will suffer and am prepared to loose some.

I'm more interested in how much of an affect other factors have on towing performance.

E.g. a 255 85R16 is slightly taller than 285 75 r16 but the 255 is narrower and has a much smaller contact patch inflated at 80 psi. Would a 255 edge out the 285 on Towing performance even though it is slightly taller?

 

IMHO, I think the diameter of the tire has a bigger impact because of the fact that it is changing your "gearing". You will be losing torque in each gear which is pretty important when towing.