if you only took 5-8mm off the hub surface i don't believe it would hurt/weaken them. main thing here is to measure your backspacing and make sure you have enough room to move the wheel/tire combo back that distance. you could run a stretched tire to give more clearance near the fender lip, of course as well as roll the fenders. there are other ways that may be much easier to make the wheels clear.

just for reference what car are these wheels going on?