Speedometer and Larger Size (dia) Tires

[Blueox76]

Can the speedometer be adjusted to indicate the correct speed with larger diameter tires?

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[IHateSpeedbumps]

Kinda. But usually it is not needed.
I went up to 235/60/18s and my speedometer matches the radar speed signs now.

 

[Dmat]

It may be possible to do so with Forscan.

https://forscan.org/forum/viewtopic.php?t=15994

 

[EONR24]

See if this information and links work for you! Forscan Ultimate Spreadsheet

 

[EONR24]

It may be possible to do so with Forscan.

https://forscan.org/forum/viewtopic.php?t=15994

Check the link above. I believe it's doable in EZ mode but when you change it you will likely receive DTCs. which will go away if you reset your modules. Check those links in the spreadsheet

 

[Dmat]

Check the link above. I believe it's doable in EZ mode but when you change it you will likely receive DTCs. which will go away if you reset your modules. Check those links in the spreadsheet

my link was the what the forscan spreadsheet links to lol

 

[EONR24]

my link was the what the forscan spreadsheet links to lol

Ah I gotcha my bad lol. Basically you want to calculate your new tire circumference and change the tire circumference to your new number in the BCM. Should be able to do it in EZ mode. Then you will need to reset the modules so they are free of DTCs which is shown in this link below.

https://www.bronco6g.com/forum/thre...th-forscan-for-2021-bronco.23064/#post-817418

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