I am looking for information from anyone who is running 315/75R16 tires on a 7.3 Power Stroke Super Duty. Currently I have 285/75R16 BFG ATs on my '99 PSD. One of my buddies is going to sell his 315/75R16 BFG ATs, and I was thinking about buying them.

I know I would need to do the front leveling kit to better clear the tires. My main questions are:

How much fuel mileage would I lose?
How would the wider tires do mounted on my stock 8" wheels?

You will have to do more than level it. those are 35's and you can only fit a 33 (305) with the leveling kit. As for the mileage, it depends on your tranny and gearing, stock gearing and an auto will cost you about 2 mpg.

I am looking for information from anyone who is running 315/75R16 tires on a 7.3 Power Stroke Super Duty. Currently I have 285/75R16 BFG ATs on my '99 PSD. One of my buddies is going to sell his 315/75R16 BFG ATs, and I was thinking about buying them.

I know I would need to do the front leveling kit to better clear the tires. My main questions are:

How much fuel mileage would I lose?
How would the wider tires do mounted on my stock 8" wheels?

he can clear those tire stock with little to no fender trimming. I know because I have done it.... The tires barely rubbed at full lock, but they fit. The leveling kit will help even more. The mileage will suffer alittle. I seemed to get 13.2 on my on board computer doing mixed driving, and I had not adjusted the speedo/odo for the size diference from stock!!!!

I guess if you are mall crawling, they will not rub. But if you plan on actually using the 4x4, they will get your fenders.


he can clear those tire stock with little to no fender trimming. I know because I have done it.... The tires barely rubbed at full lock, but they fit. The leveling kit will help even more. The mileage will suffer alittle. I seemed to get 13.2 on my on board computer doing mixed driving, and I had not adjusted the speedo/odo for the size diference from stock!!!!

I guess if you are mall crawling, they will not rub. But if you plan on actually using the 4x4, they will get your fenders.

:laughing: Yeah I take my crewcab tow rig out all the time. :flipoff2:

I had those tires, on stock rims for 4 months, only rubbing I had (even light offroading) is at full lock with the steering and tire rubbing the spring. Other than that it was fine. With custom wheels/different offset you will have fender clearance issues. Here's a pic after putting an add a leaf in the front.

http://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=65719&.jpg

mine has a leveling kit with 315s they only rub on the leaf springs. I have stock wheels it all works good. I have the 6 speed and get about 16 in town

http://www.texasoffroad.net/albums/lonestar/Tow-Vehicle-Trailer-Misc/reidbd_070.sized.jpg

I'm currently running 315's on my F250. The truck has no lift. At the rear edge of the the front bumper 3/4" needed to be trimmed for clearence. At the rear of the front fender some trimming was required.

Also, I believe the stock wheels are only 7" wide, not 8". Although that may depend on year.