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Spare tire wrong size?

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Old Apr 26, 2007 | 01:40 PM
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Spare tire wrong size?

I just bought a 208 F-350 6.4l with the 20" Alloy Rims 275/65/20 tires.

The spare tire looks to be a 275/70/18.

Did they give me the correct spare tire? If so will a 275/65/20 fit in the spare wheel holder?

Thanks...
 
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Old Apr 26, 2007 | 03:17 PM
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A 275/70R18 A/T is the correct spare tire for trucks ordered with 20" wheels. That has been the standard spare tire size for trucks with 20" wheels since '05.
 
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Old Apr 26, 2007 | 03:54 PM
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Originally Posted by Technologist
I just bought a 208 F-350 6.4l with the 20" Alloy Rims 275/65/20 tires.
The spare tire looks to be a 275/70/18.
Did they give me the correct spare tire? If so will a 275/65/20 fit in the spare wheel holder?Thanks...
The 20-inch wheel will not fit with receiver hitch installed, this is the reason FMC puts an 18-inch spare on a truck with 20-inch wheels.

Hope this helps
 
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Old Apr 30, 2007 | 01:31 AM
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Thanks for the answers... It would be nice to have an exact size spare. Any chance a 20" would fit deflated?
 
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Old Apr 30, 2007 | 10:43 PM
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Originally Posted by Technologist
Thanks for the answers... It would be nice to have an exact size spare. Any chance a 20" would fit deflated?
I am not sure if it would fit or not. But what Good is a Deflated spare??? If the spare is deflated then you may as well run without a spare.

The 18-inch wheel and tire is only .92 inches in diameter smaller than the 20-inch wheel and tire so difference is small.

IMO stick with the inflated 18-inch wheel over a deflated 20-inch wheel.
 
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Old May 1, 2007 | 01:23 AM
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Originally Posted by blackhat620
I am not sure if it would fit or not. But what Good is a Deflated spare??? If the spare is deflated then you may as well run without a spare.
The thought of driving 300-400 miles from the desert with a mismatched tire bothers me when the correct size tire is so close to fitting. Ford should of increased the spare wheel well size. I have a few quads so I always carry a 12 volt pump. It only takes 3 minutes to fill the spare so it's not really a big deal.
 
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Old May 1, 2007 | 01:26 AM
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Originally Posted by Technologist
The thought of driving 300-400 miles from the desert with a mismatched tire bothers me when the correct size tire is so close to fitting. Ford should of increased the spare wheel well size. I have a few quads so I always carry a 12 volt pump. It only takes 3 minutes to fill the spare so it's not really a big deal.
Problem with space for a 20-inch tire is the frame rails and a reciever hitch. It would be alot of modifying for one tire size. Your 12volt pump will work if there is enough air in the spare to keep the bead seated. If you lose the seal at the bead it will take high pressure to reseat the bead of the tire on the rim, and your 12volt pump will not be able to reseat the bead.
 
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Old May 1, 2007 | 12:39 PM
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Isn't this where explosives and/or highly flamable liquids come in to play?????


The starting fluid trick works well but it is easier to avoid the problem in the first place.
 
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Old May 10, 2007 | 11:49 AM
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I had a guy at work that fit a 35X12.50R18 in the stock location with the factory hitch on his '06. There is also a guy on another forum that has a 315/75R16 in the stock location on his '04, it too has a factory hitch. These are the two largest tire sizes I have seen/heard of fitting in the factory spare carrier with the factory hitch and no modifications. So it is not entirely out of the question being the factory 20" tire is slightly smaller than the two above. Although I would test fit one of the wheels off your new truck in the spare carrier before making any purchases/decisions.
 

Last edited by PowerStrokeHD; May 10, 2007 at 11:57 AM.
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Old May 10, 2007 | 11:39 PM
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OK Guys, I've always wondered....Any problem with driving with the different sized spare? I've got 35x13.50x20's...brian
 
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Old Aug 19, 2013 | 11:01 PM
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anyone know the rim width of the spare. im looking for a 35 inch spare tire to put on the stock 18 maybe try to find a used 285/75r18
 
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Old Aug 20, 2013 | 09:35 PM
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Originally Posted by bneafus
OK Guys, I've always wondered....Any problem with driving with the different sized spare? I've got 35x13.50x20's...brian
As a temporary tire and try and stay out of 4x4 it should not be a problem. All the automobiles do fine with their space saver spares and they are not the same size.
 
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