Wheel/Tire question and AlfaOBD

[CanRebel]

Changed my Wheels and Tires on my Rebel 2021.

I would have to adjust the setting in Truck for new sizes.

Got OBDLink MX+ and ZAutomotive SGB module.

Got it connected, found to place to adjust it.
Since it didn't have size of my tires and wheels. It ask to enter circumference in MM
Went to tiresize website someone gave me. It gave me 2708 MM

Add it, and updated my truck. Drove the truck around, all good. No clue if it really updated and/or if the setting is correct.

Now the purpose of my post... I was looking at Log from Alfaobd.
I pulled settings before and after.

First time it shows tires at 2558
Second time it shows tires at 2708 (what I changed it too)

I look on the tiresize.com web site and it shows my tire size should have been 2644.

So that is a bit confusing. Is the web site wrong, or did factory put wrong size? Or am I reading it wrong.

Wheel/Tire for stock was 275/70/18 and I put 295/60/20

 

[CanRebel]

On a side note. I noticed my front and back sensor's aren't working anymore.
Not sure why changing the tire option in AlfaObd.

Now I have figure out how to turn it back on Should have left the speedo alone.

 

[CanRebel]

If anyone cares or runs into issue I had.

tire web sites I was looking at, say new wheels/tires I have are 2707.6 or 2708

Which is what I add putting AlfaOBD. Well my truck doesn't like 2707 or 2708.
Even thought I would get no faults. Front and Back sensors wouldn't work.
It detected them, and I could turn them on and off. but it would say "Unavailable"
and the light would stay on both front and back switch in Off mode.

So I started putting different numbers. I put 2660 and sensors come back on.
Didn't matter if I did ABS part or not. No faults and everything worked.

Then 2670, 2680, 2690, 2700, finally 2705. All sensors working and didn't bother with ABS parts.
I got no faults at all. Drove around. No issues. Parked, Backup really close other things. Sensors worked.

Should do the ABS part at some point, but so far it doesn't seem to be needed.
I was reading others who were doing it. Had did the ABS part, because they were getting faults.
I checked ABS for faults every time I made change, was none.

Different for 2021? No clue. Why putting 2707+ caused front and back sensors to stop working.
ABS changes didn't either way thought.