Front track width

kesteb said
The factory measured the "track width" from the center of the tire to the center of the opposite tire. So if you had 13x4" rims and 6.50/13" tires your "track width" would be different then if you were running 14x5.5" rims with E70 tires. Even thou the suspensions were the same on both cars.

MoparLeo said
If all of the wheels are the same size/offset, the front track would still be wider than the rear. the change would be equal front and rear.

The measured track width would only change is the offset of the rims changed. Changing the rim and tire width doesn’t change the track width, you’re measuring center to center.

If the 13’s and 14’s in the example are both +0 offset, the track width is identical because the centerline didn’t move.