Getting ready to order some Advan wheels in 17x8 45+ anyone know if this will tuck under the fenders?

 

Probably not. Depends on camber though. I know that my 16x7.5 with 45 offset, 215/40 Hoosiers stick out about 1/4" beyond the fender. Of course, I am at stock camber settings. Add a quarter inch for the extra half inch of width, and they will probably not tuck unless you add negative camber.

 

my tires come right out to the edge of fenders.

15x7.5" +43 225/50-15

 

ok just to confirm my friend is running 17x8 slips on this tire and it tucks

 

It really depends on how low you are dropped. Your offset is sufficient to not rub if you slam your ride.