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Spare tire different size than other 4 tires

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Old 08-29-2018, 08:53 AM
  #11  
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Originally Posted by Earl
I lower my spare every spring and fall to be sure it's ready if & when it's needed. Give the tire & wheel a good cleaning, check the tire pressure and also clean & lube the cable. Thirty minutes easy work twice a year is worth it to know everything is good.

I was having this very same conversation with a neighbor one day and asked him how he maintains his spare.

He replied that he didn't know if he even had a spare and if so he asked me where he'd find it. He's had the truck for 11 years plus 2 other vehicles and he has no clue where any of the spares are or even if they have air in them.
That’s great to hear but you are one of the very few who does that. It has become my routine now at least annually. Where I live there is no cell service to call for help. If I get a flat I am on my own.

Related to this - I just upgraded to a ‘15 Lariat that I bought used. After getting it home I went over the entire truck. One of the things I did is to make sure everything was in the tool kit and drop the spare and check it. While doing this I took the lug wrench and made sure it fit the lug nuts. Well guess what - it wouldn’t fit 80% of them - swelled lug nuts which is a common feature on Ford trucks in the rust belt.

Ordered a set of new Gorilla lug nuts right then.

https://www.f150forum.com/f118/swollen-lug-nuts-365302/
Old 08-29-2018, 09:08 AM
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Originally Posted by geobolduc
I just purchased a 2018 F-150, and discovered the spare is a different size than the other 4. The four tires are Hankook 275/55R20, and the spare is a Wrangler 255/70R18. I called the dealer's Service Dept. and was told all new Fords ship this way. Could someone please confirm if this is in fact the truth? It seems to me having one tire a different size in the event I got a flat, would make for an awkward ride.

Thanks,
George
The difference is immaterial. As noted, the spare is only 0.14" shorter than your other tires. That's only a 0.46% difference (even many 4x4s came with a bigger difference than that in the front/rear axle ratios).
Old 08-29-2018, 11:14 AM
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Originally Posted by Rnlcomp
Be glad it's not a Dodge. We have a fleet of Promasters and those things don't have a spare at all, they have a 12v tire inflator with a chamber full of fix-a-flat that spews out as soon as you connect it. Talk about a fubar mess. Sure as hell won't do any good if you pop a tire.
.
Its not only Dodges.
Most car makers depending on model are going to the no spare thing thanks to CAFE standards and cost savings.

https://www.thetruthaboutcars.com/20...me-spare-tire/

Click on the link a comprehensive list of vehicles near the bottom of the page to download the .pdf file.


Also check out this interesting attached AAA pdf file:
Attached Files
Old 08-29-2018, 11:27 AM
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Be glad Ford does not put run-flat tires like my Audi Q7. After using the goop and included compressor, the tire now needs to be replaced.
Old 08-29-2018, 10:16 PM
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Originally Posted by Earl
I lower my spare every spring and fall to be sure it's ready if & when it's needed. Give the tire & wheel a good cleaning, check the tire pressure and also clean & lube the cable. Thirty minutes easy work twice a year is worth it to know everything is good.

I was having this very same conversation with a neighbor one day and asked him how he maintains his spare.

He replied that he didn't know if he even had a spare and if so he asked me where he'd find it. He's had the truck for 11 years plus 2 other vehicles and he has no clue where any of the spares are or even if they have air in them.
It doesn't matter if he knows where the spare is or not as I can guarantee you that he wouldn't know how to change it in the event he needed to.



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