Yes, but it should read the other way. The error margin was bigger when I had 225’s.
dunno if anyone will call ******** on this but...
my theory is, 07 sticks were incorrectly programmed to think they're running 3.73 gears instead of 3.55. I did some extensive napkin math one year (lots of steady state speeds compared to GPS on my phone), and the error was damn near exactly the error between 3.73/3.55. Also you CANNOT change the tire size on an 07. I tried, I have the PIN code for my ECU, and it still won't let me custom program a tire size. every time I do it defaults to the SMALLEST value and causes a wildly inaccurate speedo... as in a 100mph indicated at 60mph. my only choice a this point, is to run 235/75 or 245/75 sized tires to get the speedo to ready "correctly."
I have a set of 3.73 diffs I can install, but that's a pretty tall job to do for a very small return.