Rim and Tire Size

So the current tire I have on my truck is a 245/75R16 which is what it came with when I bought it. I want to get the Method 305NV's But I don't really understand sizes for rims. My tire has a lot of tread left so I would like to use my current tire for a while and eventually get 265's. I obviously will need to stick with a 16" rim but pretty much I am asking would this wheel work with my current tire until I upgrade down the road?
(edit :I dont know why the image of my tire is upside down)

 

P265/75/16. Or P265/70/16. Would be the largest you can go
Without some
Cutting

 

Yep those will work for both current and your upgrade down the road

 

I know you can go 255/75/17 if you have the 3rd gen take offs.