OK, it's generally good practice to take fast or tight corners with the inside crank arm up and I'd advise your wife to make this a habit on any bike. If the tire change plus crank arm change reduces the bottom bracket lowering by 15 of the possible 19 mm, the change should be minor.

Edit: After i wrote the above, I saw your measurements and I assume the crank change has not been made. The change you measured is about 12 mm and the crank arm change will reduce it to 7 mm.