Typically 185 is slightly narrow for a 7" wheel but they are only 0.4" narrower than a 195 in the same aspect ratio. I put some pics of the tire profile when I was looking at tire sizes a year ago or so before I finished the RS's. No problems at all. I think a lot of people are apprehensive about a small stretch but I think it makes for a good look and still handles just fine. I was going for fitment over traction as my car is mostly just driven around town and not tracked. (Although i think it would still do pretty well on a circuit)
I installed extended studs on all of the hubs (front and rear) just to make sure i had enough. Ended up cutting just a bit off of the front ones but the rears were good.
I have a bunch of pics up on my Instagram account if you'd like to take a look. Username: nicktahoe