Adjusting tire size to 35’s

[RicknDeb]

I have a 2022 Ram limited with park assist on 22’s. I just put 35’s on the truck and need to make the adjustment in the ecu. I’ve seen several folks do so via Alpha OBDII. Does anyone have any insight on the topic?

 

[suli]

AlphaOBD or Jscan will do it. You need the app, a obd2 adapter, and maybe a security bypass cable (not sure if you do for tire size change or not).

 

[RicknDeb]

I ordered the bypass cable. And have been watching videos on YouTube of folks using Alpha obd. I was just hoping to have someone on here that’s actually done it.

 

[firemedic10584]

Ya, I've done it. When you're in Alfa, there's a spot for "program tire size". Just do that and there is a premade tire size that are 35s, use that. The width and wheel size doesn't matter for this. Just the circumference of the tire.