I don't know if you can change it or not. I noticed it used to be in miles on my truck and then after I updated EFI one time it went to KM. I figured it had something to do with the VIN and the fact it's a maple leaf destined truck and EFI just automatically changed it.
Other than that, just change the numbers the same way you would for miles-more rev/km = smaller tire diameter. I run a 403 rev/km for my 305/60R18 tires.
When you select Configure Display Units, select all, then select imperial. Then also select the radio button by the imperial that I've circled in the attached image.
yep I completely had ignored the box in configure display units that 8100 power pointed out. thanks, guess i need to slow down and look at everything.:hug: