tire questions

hello there ...

I have been running bf goodrich at/ko and need new tires
now, factory size says 265r 70r16 but the ko's i have now are 255's..any reason for that ?? i bought the truck used.

i have been hearing good things about the cooper at3 , which i was thinking
about giving a shot . if i do, should i stay with the 255's or go to 265?
im also a little confused if i should get the LT or P metric ? i really dont tow anything and every now and then will move weights and lumber but nothing too crazy . bare with me here im a newbie....

 

If you're not doing much towing or 4wheeling, I would go with P tires - 265/70 or 265/75. I looked at the AT3s too but ended up getting Hankook Dynapro ATMs. So far so good.

 

i like the hankook in a 245 75 16, which is the stock size for a 75 tire, or 265 70 16 for the 70 level.