Hi Luvdemzeds,
I have the R31 caliper and discs on the rear with the standard rims for my street tyres and they clear fine. I also have Rota RB 15x8's for track tyres and they fit fine as well.
In fact I have got commodore/FPV front calipers and discs on the front of my car and they clear the standard rims fine as well. I had to grind a tiny bit of metal off the calipers, but about 0.5mm of a fin was all and they fit without rubbing, talk about versatile standard rims!