I bought these tires to fit my 2015 F-150 winter tire set. Now it's getting colder and snow is announced. I changed the tires and found to my disappointment that they didn't work. I've been to three different stores to pair them with their tool. They said they must be defective. What now, it's high time to return it, and even if I paid for its replacement at a tire shop. So frustrated he warns me about tires every time I drive my truck.