I bought a used county F-150 with many miles on it. The truck is a 4X4 regular cab in very good condition. I want to put some good A/T tires and new rims on it but dont need to spend a bunch of money. First question is what are the largest tires I can use with out modifications. It has P245 R16 75 now and they look very small in the fender well. Second question is would you go up in size from 16" rims. Thanks.

 

I know Tire rack .com has some good prices for rim/ tiers and rim tire combo.