Falken Ziex ZE001 A/S. The tires are the same as offered OEM on the 2018+ 18" wheel equipped Crosstrek, so you can probably look into reviews from those owners. Also, you can look here for more info, although there aren't many reviews. Tire Rack Falken Ziex ZE001 ASWe were told the ascent comes with Falken All-Season tires, does anyone know the exact model? Are these any good in the snow?
A/S tires are typically adequate for winter driving (especially with AWD for the situations it helps) but as with any all-season tire, a dedicated set of specific winter tires will be the best performing in show.