Its about the spare, or the lack thereof

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May 23, 2017 | 02:23 PM

#61

bk000

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Joined: Feb 2016

Posts: 83

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From: Dallas

Here's a chart indicating tire sizes for certain wheel widths.

Tire Width for a Wheel/Rim Size Chart

If your F has 20" wheels you have 20x9 in the front and 20x10.5 in the rear.

May 23, 2017 | 02:55 PM

#62

Unhingd

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Joined: Dec 2014

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From: Maryland, US

245/40 would be the throw-away tire size to use for both front and rear 19" wheels. Fairly easy tire size to find under $125.

May 23, 2017 | 08:37 PM

#63

Misujerr

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Joined: Feb 2017

Posts: 915

Likes: 100

From: SF Bay Area, CA

Quote:

Originally Posted by Suaro

I had a new car delivered to me by the dealer with three 17s and one 18 and I didn't notice anything until I happened to read the sidewall after about 500 miles.

Yikes, now y'all have me wanting to check my tires, lug nuts, alignment...

Quote:

Originally Posted by DPelletier

My only concern would be if you put one on the rear and had LSD.....though I suppose you could swap a factory front tire onto the back and put the "odd tire" on the front to get you to where you needed to go.
Dave

I was thinking about the diff too, that would be a good solution, UNLESS it was an AWD, then all four have to be exactly the same, right? I have a friend that fried her diff on an AWD Volvo wagon. Not because of different sizes, just because she got two new tires and had two worn tires...

May 23, 2017 | 09:37 PM

#64

Suaro

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Joined: Jan 2017

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From: Arizona Desert

Naw, nothing to worry about. The car with the three 17s and one 18 was an AWD Volvo VR. The one that upset me was the MB Wagon when they put on the wrong load rating (not XL) and then under inflated it.