What are the largest tires I can use on a 2001 f150 8" lift and 16" rims 10" wide

 

8inch lift. wow

My only concern would be can you afford to replace one the same day it blows out......

I have Cooper's and had a blow out last week and now truck sitting in yard waiting on new tire to arrive; ordered online

$300.00 dollars in a matter of a moments with mudders compared to $35.00 used normal size until you want to buy a new one....It sucks and I am re-thinking my decision

 

...pretty much whatever you want, but I think a 44" seems right. 38.5's fit on a 6" with some spare room. 8" is pretty high and expensive to fit tires to.