i use 25mm hub spacers on the front but have converted it from wheels bolts to studs and nuts for the safety
25mm not a problem
even made 25mm spacers to go on the back behind the drum brake/hub works well as its not putting extra strain on rear wheel bearings

How do you convert it to studs? lol sorry just dont know much about wheel fixtures.
Also how was the look that you got from having 25mm spacers? Did you get a wide appearance, as this is what I want to aim for as atm mine standard wings make the car look small, so I want to push out the car more by using spacers, Thanks.