The Azaro 170/60 was designed to fit safely, if not very effectively, on a 4.5 inch wheel... But apparently most 160s are slightly pinched on a 4.5, never mind going bigger. Don't really know how true this is, I know back in the dawn of time they were recomended fitment for 5.0 wheels. But these days, the tyre companies most know probably 2/3 or so of all 160/60s go on a 4.5, so I'd be amazed if they don't take that into consideration.
I'm going to fire a 180 on the B12 wheel and see how that works out... No science in that at all, it's just what happened to be cheap
Oh aye, Bandit 12 wheel and carrier is lighter than an SV wheel. I doubt I'll notice