Tire size confusion...

[DuallyGirl]

So I am in the process of finally being able to add some changes to my stock 06 350 dually. I am getting a 2" leveling kit and want to buy some new all terrains. I have heard about 20 different opinions on what size tires I can fit on both front and back without using spacers on the duals. any suggestions? I've seen a lot of threads about tire size but none have helped so far. Thanks!

[ralphinnj]

The first thing you need to do is to say what you want to do. The rears on these F350 duallies can hold a lot of tire. Where you will have the problem is up front, and specifically, the front plastic part of the bumper. The other question is whether you will change wheel size or not. It sounds like you just want tires.

Using the stock rim, there are not many tires that won't fit up to 35" tall. 35's might require a small amount of clipping on the front plastic piece, but I doubt it. Something like a Toyo AT would look great on that truck.

Ralph

[DuallyGirl]

Thank you very much- yeah I'm going to use the stock rims. Most people have told me 35's and I don't mind if I have to shave a little off my plastic piece. I appreciate your help and thanks for the tire suggestion cause now it's time to go tire shopping

[ralphinnj]

If you have a 20" rim, here is the tire you want:

LT325/60R20 121R D/8 301410 9.5-10.5 74 16 35.2 12.9 15.9 3195 – 50 – 591 2P+2S+2N 2P
(35X13.0R20)

find it here about 3/4 down:

http://marktg.toyotires.com/file/18971.pdf

or if you really want a tough look, go with MT's:

http://marktg.toyotires.com/file/18136.pdf

R

[SmokeyWren]

Originally Posted by DuallyGirl

Thank you very much- yeah I'm going to use the stock rims.

Don't let these guys lead you down the primrose path.

On your 2006 Dooley, your stock wheels are 17"x6.5J. Yes. 6.5" wide. The tire makers all say that the widest tire you can safely run on those wheels is LT245/75R17 or LT255/70R17. In BFGoodrich AllTerrain, the LT245/75R17 is not quite 10" wide and not quite 32" tall. (BFG doesn't make the 255 in the AllTerain.)

The next bigger size, LT265/70R17, requires a 7" wide wheel. But you don't have 7" wide wheels.

Oh, you'd rather have a Toyo tire? Sorry, but the Toyo Open Country M/T comes in LT265/70R17 but nothing smaller. And sure enough, Toyo says that tire requires a minimum wheel width of 7" .

But wait! You didn't want that agressive M/T anyway. The Toyo Open Country A/T comes in size LT255/70R17, and Toyo says it will fit on a wheel with a minimum width of 6.5".
http://marktg.toyotires.com/file/18971.pdf

That A/T tread still too agressive for you? Toyo makes the Open Country with a highway tread (H/T), and yes, it comes in size LT255/70R17.

Can you run tires that require a 7" wide wheel on a wheel that's only 6.5" wide? Sure. Ignore the experts. Who needs them anyway?

But if you decide to rely on the tire engineers instead of some dude on the internet, then go with LT255/70R17 as the biggest tire you can safely run on your stock wheels.

35s? The BFGoodrich LT315/70R17 is the modern equivalent of the old 35". But the narrowest wheel it will fit on - per BFGoodrich - is 8.5". So your 6.5" pizza cutter wheels don't quite qualify.