Stock tire ?
Laughing Gas
Joined: May 2015
Posts: 1,117
Likes: 2
From: Hatfield's side of river
My King Ranch has the 20" wheels and a 18" Firestone spare. The circumference of the tire is the same on both. Ford doesn't put high dollar wheels under the trucks for spares.
At least Ford isn't putting a can of fix-a-flat (no spare) under there like Hyundai does.
At least Ford isn't putting a can of fix-a-flat (no spare) under there like Hyundai does.
Junior User
Joined: Jun 2017
Posts: 51
Likes: 0
20 inch Michelins with an 18 inch Goodyear Wrangler for a spare. Spare is a good looking tire, I wish the Michelins were
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Mountain Pass
Joined: Dec 2008
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Lead Driver
Joined: Jun 2005
Posts: 8,463
Likes: 724
From: Calgary Canada
I work at a car rental company and about the only time a spare tire gets used is when it's stolen right out of the vehicle!
I'm happy to have a "real" spare on a pickup however, as with me, I'm more likely to be out of cellular coverage or towing/hauling where a full size spare is a safety issue.
New User
Joined: Jun 2021
Posts: 1
Likes: 0
Appreciate all the input in this thread. Changed my circumference to 2770, Did a relearn on PCM and TCM, no CEL and speedo is with in 1 MPH of GPS at 70+. 2020 F250 Platinum with 6" Fabtech lift rollin 37x13.50x22 Nitto Grapplers
You all rock thank you
You all rock thank you
Logistics Pro
Joined: Sep 2002
Posts: 4,410
Likes: 1,016
From: Central KY
As far as steel 18" wheels under the trucks for spares, they do that because most people never remove them for cleaning or to use them and so they get blasted by weather, road grime, salt spray, etc. constantly. Steel holds up better, is less expensive for them, and can be sanded and painted if need be by the owner later down the road.
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