Looking to replace my stock tires and i wonder how big i can go before it really starts to affect my mileage...

The only thing suspension wise that i have done to the truck is a 2" leveling kit.

I will keep the stock rims. I would like the tire to have the width match the height, if that makes sense. Like a BFG AT or something like that.

Thanks

 

well my truck came with 245/70/17s. i put 285/70/17 bf goodrich all terrains on. gas milage was effected some, i average 12.9, i dont do any highway driving either.

 

You can run 33's easy, maybe even 35's.
However, anytime your tire gets taller or wider or both, your mileage will drop.
If you are worried about mileage that much, don't mess with it.

 

I replaced my 245's with a 2" level kit and 285 toyo opn country's. Mileage was affected a bit, but still around 17-18 at 75 on the highway. After much discussion here I'm happy with the way it looks with the stock alum. 17"..IMO. There is a thread somewhere on this site that explains everything, but I can't find it.