Will they fit? 7 inch wide, ET25?

I have two sets of rims (Momo Stars), both are 7 inches wide with ET25. One set are 16's, the others are 15's. Are they going to fit without arch mods? I dont know what tyres Ill run on the 16's, but I want to run 195/50/15's on the 15's.

15s should be ok, 16 i dont see why not with lower profile tyres so the rolling radius is the same. you may have to roll the front arch lip just a touch depending on how low the car is and what the camber is set at

Thanks for the reply.