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2008- 2010 General Questions General questions related to 2008-Up Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

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Old 04-02-2009, 05:14 PM   #1 (permalink)
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2008 F250 Stock Rim and Tire Size

I have a 2008 F250 FX4 with 18 inch stock rims. I want to know how wide and how tall I can go on the tires. I've heard 35 inches tall (is that right?), but can I go a half inch wider than the rim width range? Any help is appreciated.
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Old 04-02-2009, 07:24 PM   #2 (permalink)
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If you're smart, you'll go by the tire makers' specs for their tires. The specs include the width of the rim required.

For example, your rims are 18"x8". A popular tire for our trucks is Toyo Open Country M/T. Toyo says their size LT285/75R18 will fit just fine on your 8" wide rims. That tire is 35.1" diameter and 11.6" wide.
Click on this: OPEN COUNTRY M/T | Toyo Tires
Then click on "sizes and specifications".

Another is BFGoodrich AllTerrain. They say their size LT285/65R18 will work on your 8" wide rim, but their next size up = LT305/65R18 requires rims at least 8.5" wide. They don't make the size LT285/75R18, so the lower-profile AllTerrain will be a bit shorter than the Toyo.

I doubt anybody makes it, but if you could find size 295/75R18 that might be the biggest tire that the tire maker says will safely fit on 8" wide rims.
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Old 04-02-2009, 08:42 PM   #3 (permalink)
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If you like the Toyo's and don't want quite as aggressive a tire as the M/T, the A/T provides a very nice ride while still looking slightly aggressive.
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Old 04-02-2009, 10:07 PM   #4 (permalink)
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Alright, this may sound redundant, but the 35.1 tire height won't be an issue with no body or suspension lifts?
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Old 04-09-2009, 09:50 PM   #5 (permalink)
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I have 35x12.5x20 Toyo M/T's on my stock 20" rims. For the first two years I had the truck, I did not have any lift on the truck at all. I just installed a 2" leveling kit on Saturday because my winch bumper made the front sag a little, but I still had no rubbing at all. Here's a picture of my truck:

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Old 04-09-2009, 10:25 PM   #6 (permalink)
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I've got the exact same truck..... thanks for the answer, and the pic!
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Old 04-10-2009, 02:26 AM   #7 (permalink)
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No problem. It's not really much of a difference between the before and after. Here's a picture before the 2" lift:



And here's a picture after the 2" lift:

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Old 04-10-2009, 08:58 AM   #8 (permalink)
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So, when you put the M/T's on, did you notice a difference in MPG from the stock tires? I've got the Continental tires that were on it when I bought it, and haven't had a set of M/T's on a truck before. Ran BFG A/T's on a truck, and didn't really notice a difference.
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Old 04-14-2009, 07:56 AM   #9 (permalink)
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Quote:
Originally Posted by Bowhunter82 View Post
So, when you put the M/T's on, did you notice a difference in MPG from the stock tires? I've got the Continental tires that were on it when I bought it, and haven't had a set of M/T's on a truck before. Ran BFG A/T's on a truck, and didn't really notice a difference.
Maybe about 1 MPG difference. Not really worth worrying about.
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Old 05-04-2009, 09:21 AM   #10 (permalink)
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I put BF Goodrich All Terrain 305/65/18s on my truck with stock rims and they fit fine. I was told I could not go any bigger w/out making other changes to the truck, which I did not want to do. I hope this helps!!
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Old 04-12-2013, 01:47 PM   #11 (permalink)
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Freaky FX4 I'm looking to put the same tires on my 08 FX4 also. Don't have a leveling kit yet but will soon after tires. What kit did you use to level the truck? And the tires won't rub without kit?

Thx
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Old 04-12-2013, 01:51 PM   #12 (permalink)
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Freaky FX4 I'm looking to put the same tires on my 08 FX4 also. Don't have a leveling kit yet but will soon after tires. What kit did you use to level the truck? And the tires won't rub without kit?

Thx
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