2025 Lariat, 33” Tires and Forscan Tire Circumference

[SEV3N8T1]

That’s the 2024 version. The tunes are year specific. Haven’t seen a 2025 2.7 tune out yet. I know because I have a 2024 tune from before I decided to go ahead and order the 2025. Tried it for kicks and it says it’s not compatible. I’d contact stage3 before they ship and cancel. I’m pretty sure Peformance tunes are on their cannot return list.

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[mrjofus]

Yeah I definitely screwed up. But according to a Ford tech I’ve been emailing with I will be able to download the the 25 tune into my ProCal 4 once it’s available. I guess we’ll see. He also said the ProCal 4 cannot overcome the 2480 tire circumference in the BCM. And a dealer cannot overcome the limitation.

 

[ryanO]

I got my new 275/70R18 Nitto tires and Eibach coilover level kit last week, and finally tried to update my tire circumference to match the new tires. My original circumference was 2409 and I needed to enter 2571. After multiple writes and relearns it seems that the 2025 Lariat maxes out at 2480. I saw another post in this forum from a user that was able to enter larger values on their 2024 Lariat and not get the errors I see on any value above 2480.

Are there any other 2025 Lariat owners that have 33” tires and have somehow managed to get a correct value programmed in? Thanks!

Im most curious about how you like the Eibach set up? I've got a '25 XLT with the 2.7L and want to add that and 33s. Any rubbing issues? What wheel offset are you running?

 

[MasterCylinder]

Mimereads ab

thats true, you might be good if you check it on gps. stock, the speedo seemed to read about 3mph faster then the truck was actually doing so you might be close to indicated speed now. or at least closer tha

thats true, you might be good if you check it on gps. stock, the speedo seemed to read about 3mph faster then the truck was actually doing so you might be close to indicated speed now. or at least closer than before

Mine is 2mph off lower than the side of the road radar checkers, guess where the cruise gets set!?!?

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