How should I do the offset for my Tundra?

I have a stock 2003 Limited 4WD Tundra, and I am getting a 2.5 in lift from rough country. I have that much figured out, just thought I should include it in my description of my truck. My main question is rims. I have a set of wheels that are 275/65 R18 and I need rims to fit it. My question is how do I figure out how much offset I need? I really just want some rims with a good bit of offset that look good on a Tundra. If anyone could help it would be greatly appreciated

 

"Good bit of offset that look good". Thats really subjective. If you want input, we need to know what "looks good" to you. You want the wheels to comeout to the bodyline of the truck? You want some poke? What wheels do you have now, find out what their offset is. Don't know what stock was/is on your first gen, on my second gen it was +60. I took my offset down to +1 to bring my wheels out to the fender flares I added.

 

I found this truck that I really like the overall look of, I don't know how much offset that is though. It has the same lift kit I'm getting so I would like mine to look something like this