I have a lowered em1, she sits on the stock si wheels (15x6) with 195/50r15 instead of the oem 195/55r15, and the gap between tire and fender is approximately one finger.

So I plan on upgrading to a 16" wheel that is (16x7) which means its an inch wider.
Now my biggest concern is, is it safe to put 195/45r16 tires into the 16x7 wheels, and would it still retain the one finger gap from the fender?

edit#1: Both oem and the aftermarket wheels are +45 offset.

 

Well, for the comparison of 195/50/15 and 195/45/16; the 16" tires are slightly larger then the 15" tires. You're going to lose about .12 inches of space between the tire and the fender.

 

you can put them with no problem
they will look awsome xD