Looking for Forscan BdyCM tire values for Lightning Lariat.

[WhiteBolt]

I recently put a set of factory 20" Lariat rims w/General Grabber HTS 275-60-20 tires on my 22' Pro and my speedometer is now consistently reading 2mph slow.
I want to use Forscan to recalibrate the speedometer. I have already scanned my truck and saved backups of all "as built" modules. I know there are tire calculators out there than can give me tire circumference, but I would rather copy OEM BdyCM factory values directly from a Lightning Lariat. I think these would be the most accurate values to get my speedometer and GOM reading correctly.
Forscan values from my Pro w/18" rims:
BdyCM - Tire Circumference=2476
BdyCM (as built) - 726-12-01 = xxxx 3146 xxxx
726-15-01 = xxxx xxxx 09xx
726-15-02 = ACxx xxxx xxxx
Would appreciate if anyone could tell me the factory values from their Lightning Lariat.
Thanks

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[WhiteBolt]

I found the data I needed here..... https://www.motorcraftservice.com/AsBuilt
I input a vin from a lariat I found in a dealer ad. and downloaded its "as built" data.
Looked up the tire data (09-F3), converted it from hex to decimal (2574) and wrote the result to my BdyCM "Tire Circumference" module.
Ran PCM "Module initialization/relearn" procedure.
Now my speedometer is reading accurately again.

 

[WhipSticks]

It's a shame that none of the wonks around here could not have helped more directly! But well done! And Gutsy! Were you sweating bullets when you hit "ENTER"?

 

[eRockBoon]

What is 726-12-01?
I only changed 726-15-01 and 726-15-02 to adjust my speedometer.

 

[WhiteBolt]

What is 726-12-01?
I only changed 726-15-01 and 726-15-02 to adjust my speedometer.

Never mind about that 726-12-01. I found out it's only pertinent to 2015-2020 trucks.
I recorded, but didn't edit 726-15-01 and 726-15-02 because it was in the "as built" module.
I only edited "tire circumference" in the "BDYcm" module.
That still corrected my speedometer though.

 

[WhiteBolt]

It's a shame that none of the wonks around here could not have helped more directly! But well done! And Gutsy! Were you sweating bullets when you hit "ENTER"?

Not really, but I did a lot of research about Forscan programming before trying anything.
I also made backups of the original data just in case.

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