When there’s snow or ice on the roads, car tires don’t have enough traction and cars can’t maintain control.
Tire chains used to be literal chains, and still are for some very large tires, but mostly nowadays they are cables that you physically wrap your tires in to add some traction in snow and ice.
Tire chains can be purchased in most auto parts stores. They’re made for your specific tire sizes, so make sure to get the tire size off the side of your tire before going in to purchase. Mine say P225/70R16, for example.
If your car is front wheel drive, you only need enough for the front tires (unless you’re going to be doing a lot of snow driving). If it’s rear wheel drive, you need enough for all four tires.
When you get to the point where chains are required, you can usually find somebody who will put them on for you for $$. We used to call those people chain monkeys, I don’t know if that’s still common.
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