Tire chains go on before you need them, not during a storm
Tire chains are metal links that wrap around your tire to grip snow and ice. You install them on the drive wheels — the wheels that push the car forward — before you enter snow or icy conditions. Most people put chains on in a parking lot or pull-off, not on the highway, because the work takes 15 to 30 minutes per pair of wheels and requires you to get down on the ground.
The reason to install chains before conditions get bad is practical: once you are in heavy snow, you cannot see the road clearly, your hands are cold, and other drivers are sliding around you. Chains work best when you have time, space, and daylight to do the job right. Many states require you to carry chains in mountain passes during winter, even if you do not plan to use them.
Key Takeaways
- Tire chains install on your drive wheels — the front wheels on most cars, the rear wheels on some trucks — and take 15 to 30 minutes to put on both sides.
- You need to know your tire size before you buy chains, because chains are sized to fit specific tire widths and diameters.
- The basic steps are: position the chain around the tire, connect the side chains, tighten the cross chains, and drive forward slightly to seat the chain before final tightening.
- Chains damage your tires and suspension if they are too loose or installed wrong, so checking tightness after a few minutes of driving is essential.
- Different chain types — ladder chains, cable chains, and self-tightening chains — have different installation steps, so read your specific product instructions before you need them.
Finding your tire size and choosing the right chain type
Your tire size is printed on the sidewall of your tire in a format like 225/65R17. The first number is the width in millimeters, the second is the aspect ratio, and the last number is the wheel diameter in inches. Tire chains are sold by this size, so you need the exact number before you buy. Check your tire now, or look in your owner's manual or on the driver's side door jamb where the tire pressure label is posted.
Chains come in three main types: ladder chains, cable chains, and self-tightening chains. Ladder chains have two side rails with cross-links that look like a ladder rung — they are durable and inexpensive but require more tightening as you drive. Cable chains use steel cables instead of side rails, making them lighter and easier to store, though they wear faster. Self-tightening chains (sometimes called automatic chains) tighten themselves as you drive, which reduces the need to stop and adjust them, but they cost more and are heavier.
Buy chains before winter arrives, not when a storm is forecast. Stores run out of stock quickly, and you will not have time to learn the installation steps when you need them urgently.
Positioning the chain around the tire
Park on a flat, level surface away from traffic. Turn off the engine and engage the parking brake. Lay the chain out flat on the ground in front of the tire so you can see the full length and identify which end connects to which.
Drape the chain over the top of the tire so it hangs down both sides evenly. The chain should sit in the center of the tire tread, not touching the sidewall or the wheel rim. If the chain is too high or too low, reposition it until it is centered. This step matters because a chain that sits on the sidewall will damage the tire, and a chain that sits on the rim will damage the wheel.
For ladder chains, you will see two side rails with cross-links between them. For cable chains, you will see two cables running parallel with smaller cross-links. Either way, the chain should hang symmetrically — equal length on both sides of the tire.
Connecting the side chains and fastening the ends
Most chains have a connection point at the bottom center of the tire where the two sides meet. This is usually a hook, a clasp, or a series of links. Bring the two sides of the chain together at the bottom of the tire and connect them according to your chain's design. If your chain has a hook on one end and a loop on the other, hook the loop end first, then find the hook end. If it has clasps on both ends, fasten both.
Do not overtighten at this stage. The chain should be snug enough that it does not fall off, but loose enough that you can fit one finger between the chain and the tire. Tightening too much now will make the next step harder and can damage the tire.
Check that the chain is still centered on the tire and that no part of it is touching the wheel rim, brake line, or suspension. Spin the tire by hand (gently) to make sure the chain moves freely and does not catch on anything.
Tightening the cross-chains and driving forward
Once the side chains are connected, you will see cross-chains or cross-links running perpendicular to the side rails. These are the tensioners that hold the chain tight against the tire. Most chains have two or three cross-tensioners, usually with a hook, clasp, or ratchet mechanism. Tighten each one by hand, working from top to bottom, until the chain is snug but not painfully tight.
Now drive forward slowly — about 5 to 10 feet — without turning the wheel. This seats the chain into the tire tread and helps it settle into the correct position. Stop and check the tightness again. The chain should not move or rattle when you shake it by hand. If it is loose, tighten the cross-tensioners another notch.
Repeat this process on the second drive wheel. If you are chaining both front wheels, do the same steps on the other side. If you are chaining both rear wheels (common on trucks), move to the back of the vehicle and repeat.
Checking tightness and adjusting as you drive
After you have installed chains on both wheels, drive slowly for about one minute in a straight line, then stop and check the tightness again. Chains settle and shift as the tire flexes, so a chain that felt tight when you installed it may be loose after a few minutes of driving. This is normal. Tighten the cross-tensioners again if needed.
Continue to check tightness every 10 to 15 minutes of driving for the first hour. After that, check every 30 minutes or whenever you notice rattling or movement. A loose chain can wrap around the suspension or brake line and cause serious damage, so this step is not optional.
Drive slowly and avoid sudden turns, acceleration, or braking. Chains reduce your traction in some ways (they can make steering feel odd on bare pavement), so adjust your speed and following distance accordingly. Many states have speed limits for vehicles with chains — often 25 to 30 miles per hour — so check local rules before you drive.
Removing chains and storing them for next time
Remove chains as soon as you reach clear pavement. Driving on dry asphalt with chains on damages both the chains and the road surface, and it wears out your tires faster. Find a safe pull-off, park, and take the chains off using the reverse of the installation steps: loosen the cross-tensioners, disconnect the side chains, and lift the chain away from the tire.
Lay the chains flat on the ground and rinse them with a hose to remove salt, sand, and dirt. Let them dry completely before storing them. Store chains in a dry place — a garage, a plastic bin, or the trunk of your car — away from moisture. Chains stored wet will rust and become brittle.
Keep your chains in the car during winter months, even if you do not expect to use them. Many mountain passes require chains to be in the vehicle, and conditions can change faster than you anticipate.
Frequently Asked Questions
Do I need chains on all four wheels or just two?
You need chains on your drive wheels only — the wheels that power the car forward. On most front-wheel-drive cars, that means the front two wheels. On rear-wheel-drive cars or trucks, that means the rear two wheels. Check your owner's manual if you are unsure which wheels drive your vehicle. Some people chain all four wheels for extra traction in severe conditions, but two is the minimum.
Can I install chains while driving, or do I have to stop?
You must stop to install chains. The work requires you to get on the ground, position the chain carefully, and tighten multiple connection points. Attempting this while moving, or even while parked on a busy highway, is unsafe. Pull into a parking lot, rest area, or wide shoulder where you have space and can see oncoming traffic.
What if my chain breaks or comes loose while I am driving?
Pull over to a safe location when ready and stop. Do not continue driving with a broken or loose chain — it can wrap around your suspension or brake line and cause loss of control. Inspect the chain for damage, tighten all connection points, and test it by driving a few feet forward. If the chain is broken, remove it and drive slowly to the nearest tire shop or safe location.
Can I use the same chains on different tire sizes?
No. Chains are manufactured to fit specific tire sizes, and using the wrong size will either not fit or will not tighten properly. A chain that is too large will rattle and fall off. A chain that is too small will not close around the tire. Always match the chain size to your tire size before you buy.
Do chains work on all types of snow and ice?
Chains work best on packed snow and ice. On fresh, deep snow, they provide better traction than tires alone. On bare ice, chains help but do not eliminate the risk of sliding — they are not a substitute for driving slowly and carefully. On wet pavement or dry asphalt, chains do not improve traction and will damage the road and your tires, so remove them as soon as you can.