BMW Wheels and Blizzak Tires

Four Blizzak WS70 225/45R17 tires on wheels. Two tires have excellent tread, two are quite worn - see photos. They were very helpful adding traction in winter weather on my rear wheel drive BMW. I believe they were used previously on my 2000 3 series. Wheels are in excellent condition. I used to seasonably swap out and rotate these tires and wheels, and polish the wheels too.