Just buy them in 17's then, or get the good year GTs which are cheaper, and are still rated for snow (and thus ice) I've driven mine on ice. you'll make it, just go slow. they have low snow traction for sure, but its predictable. Dry icey roads its way better then when the snow is a bit wet. so like when its late at night and 20F out, better grip then sunny and 35 with wet snow around. odd but that's what it felt like ...
When i get a new battery in my STI i can let you drive it, to feel the tires. they are good.
215/45ZR17 $98 !
Do It !! Cody is a baller with like 5 sets of rims!