Diffrence front/back track width

[Tskm2]

Whats the mm diffrence? After a quick look with my stock winter wheel they have only a 1/4in diffrence tire/fender. But most people pit penguin spacer at 10 or 12/13mm...
I buy used wheel in 15x7 et25. I just install one in front and its flush to fender and i want the same for the rear

What size spacer did you put

[myfirstyota]

Install the wheel on the back and measure from rim to fender. That will give you your desired spacer width.