Thanks that sums it up nicely with add'l info.
Yeah it's not permanent.
What is "high center"?
I hear the comment about use 265/70R15 and there is no way one could go wrong doing that.
And, Ford thought 265/75R15 was ok. From the smaller tires (235/75R15), it does raise the center of gravity a little and I'm not sure but they might have required the handling package (springs, shocks, rear sway) to get the big tires.
Is it on the fringe of too big for the 3.73, yes, but I think it's ok. Yes you will lose a little pep going bigger, etc. Speedo and all that. But none of this is severe.
Here's the thing. Take somewhere like Tire Rack. If you look under either 265/70R15 or 265/75R15 you are going to find like 5 selections. If you search 31x10.5R15 you get 26 selections. So that could well influence me towards the 31" which in fact is exactly the same diameter as the oem 265/75R15. It has a slightly (say .3") wider tread footprint than the 265/75R15. Both of those tires are 30.7" diameter so from stock it raises the truck about 1". That's something, but not huge by any means.
So all of a sudden I am looking at a whole sh*tload of choices. I think what I want is as aggressive as it can be without being really whiny on the road. I'm not sure I need the very most aggressive mud/at tires because I think someone said muds will be a lot noisier.
I suspect if I look at other dealers I'll run into the same thing - not many choices in the 265's but lots in the 31". Plus there's nothing super aggressive in 265. I think it's just not a very popular tire because most people would just say well that's a 31" (it is).