Why bother to change your tires in the winter? It's a hassle and can get expensive. You can just use all-season tires, right? Wrong!
Despite the term "all-season" tires, they are not designed for harsh winter conditions.
They will not provide the same grip that studded tires would. These tires will not hold up as well trekking through snow and driving on ice.
Winter tires are designed for extreme winter weather conditions.
All-season tire will work fine if you happen to live in an area that receives little snow and ice.