Not strong enough straps or ratchets. Only managed to do it once because they self destructed after about 10 minutes. The snow was only about 8 inches deep and fluffy. Put them on the edge of my Nissan to help me up a small hill. Worst of all, they got stuck when they broke between the rim and the brake. I had to take the tires off to take them off. Do yourself a favor and just buy regular chains for the first time.