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Old 06-08-2016, 06:04 PM   #1
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F150 Spare Tire Size

Recently purchased a used 2013 F150 Ecoboost. When checking out the vehicle, I noticed it has a completely different size spare tire than the others. I first thought the dealer must have pulled a switch on me, but when I looked at the tire sticker on the door, it lists the spare as a LT275/65R18 which is what I have. All the others are P275/55R20. What's the purpose, and is that normal for all F150's to run different size spares?
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Old 06-08-2016, 06:35 PM   #2
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It's common with all makes of trucks. The overall diameter of each tire is about 32". They are not going to provide an expensive 20" wheel for a spare.


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Old 06-08-2016, 10:17 PM   #3
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Okay, thanks. Makes sense I guess. But you would think with a $50k truck they could afford to put a basic 20" wheel and tire. At least it's not a donut.
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Old 06-08-2016, 10:35 PM   #4
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Yep, pretty standard. I think I've always been told that if you need to use it, avoid using it as a steering tire of your sizes are far off
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Old 06-08-2016, 10:39 PM   #5
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F150 Spare Tire Size

Quote:
Originally Posted by Shanks12 View Post
Yep, pretty standard. I think I've always been told that if you need to use it, avoid using it as a steering tire of your sizes are far off


But they are not far off. The two tires sizes the OP provided are basically the same on width and height. The main thing is the height being the same especially for 4x4s.

My Tundra has 18" wheels, but the spare is a narrower tire, height is the same.

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Old 06-08-2016, 10:50 PM   #6
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People demand better mileage and lower cost. What you end up with is a spare that is lower weight and lower cost. 20" are much more expensive and depemding on design package weight can be quite different. Sometimes enough to move a vehicle into different weight category for fuel economy test.
Suggest you do price comparison on wheel and tires
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Old 06-09-2016, 12:34 PM   #7
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Quote:
Originally Posted by okiecowboy View Post
Recently purchased a used 2013 F150 Ecoboost. When checking out the vehicle, I noticed it has a completely different size spare tire than the others. I first thought the dealer must have pulled a switch on me, but when I looked at the tire sticker on the door, it lists the spare as a LT275/65R18 which is what I have. All the others are P275/55R20. What's the purpose, and is that normal for all F150's to run different size spares?
I've got a 2015 tundra with 20" tires. The spare is 18. I called Toyota and they said that's the way it is setup. It's like don't see don't tell.
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Old 06-09-2016, 07:08 PM   #8
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It actually is a donut, just a larger one. I think they are rated for a maximum of 50 miles.
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Old 06-09-2016, 08:16 PM   #9
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Woody,

Hopefully it's rated for more than 50 miles. It's a Goodyear Wrangler that looks to be some kind of all terrain tire. It has a pretty aggressive tread pattern. Maybe it's not an OEM tire.

By the way, just spent a week in Cedar Creek State Park about a month ago. Very nice campground and close to Dallas metro. Just expensive if you're an out of state resident!
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Old 06-09-2016, 08:49 PM   #10
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Hopefully you are correct. The spares on my Dodges are obviously low mileage.
Not sure what park you were at? TX state parks are same rates no matter what state you are from. Our favorite is Beavers Bend state park in Broken Bow OK.
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