Do You Need Snow Chains? When Chains Are Required or Worth It

This article is part of our Snow Chains Guide.

If you live in a mild climate, snow chains can seem like a niche accessory you will rarely use. But if you drive through mountain passes, ski areas, rural back roads, or states that enforce winter traction laws, chains can quickly go from optional gear to something you absolutely need in the trunk.

The real question is not just whether your area gets snow. It is whether your vehicle, tires, route, and local regulations make chains legally required or practically smart. For some drivers, a good set of chains is emergency insurance. For others, especially those who travel in steep or icy conditions, they are a regular winter tool.

Here is how to decide if snow chains are required for your vehicle, when they are worth buying even if they are not legally mandated, and what to know before you depend on them.

What Snow Chains Actually Do

Snow chains wrap around your drive tires to create extra bite on packed snow and ice. They improve traction during acceleration, help reduce wheel spin, and can also improve control when climbing grades or descending slippery roads. In conditions where winter tires alone still struggle, chains can provide a major traction boost.

They are most useful in deep snow, hard-packed snow, glare ice, steep grades, and chain-control areas where state agencies or highway patrol require added traction equipment. They are not intended for normal dry pavement driving, and using them on clear roads can damage both the chains and your tires.

• Best for temporary use in severe winter conditions
• Especially helpful on mountain roads and unplowed routes
• Often carried as emergency gear even by drivers who rarely install them
• Most effective when properly sized and installed on the correct axle

When Snow Chains Are Legally Required

Snow chains are legally required in some areas during chain-control events, severe storms, or on specific roads where posted signs say chains are mandatory. This is common in mountain states and snow-heavy regions such as California passes, Colorado routes, the Sierra Nevada, parts of Oregon and Washington, and certain highways in the Northeast.

Requirements vary by state and even by highway conditions. In some cases, all vehicles except four-wheel-drive or all-wheel-drive vehicles with approved winter tires must chain up. In stricter conditions, even AWD and 4WD vehicles may be required to carry chains or install them.

Common Situations Where Chains May Be Required

• A posted chain-control checkpoint on a mountain highway
• A winter storm emergency order from highway authorities
• Travel on roads marked with ‘chains required’ signage
• Commercial vehicle routes with mandatory traction equipment rules
• Parks, ski areas, or remote roads with their own winter access requirements

The important takeaway is that your vehicle having AWD does not automatically exempt you. Some roads require chains to be carried even if they are not installed. Others require actual installation when conditions worsen. Before traveling, always check the transportation department or highway patrol updates for your route.

When Snow Chains Are Worth It Even if They Are Not Required

A lot of drivers buy chains not because the law says they must, but because the trip, vehicle setup, or weather risk makes them a smart backup. If you only encounter snow a few times each year, chains can be a cost-effective safety accessory compared with dedicating a full set of winter tires.

Chains Are Usually Worth Carrying If

• You drive to ski resorts or mountain cabins during winter
• Your route includes steep hills, switchbacks, or shaded icy roads
• You have two-wheel drive and all-season tires
• You may get caught in sudden storms away from home
• You tow a trailer in winter conditions
• You live in a rural area where roads may be plowed later than main highways

Even if you never use them, having the right set in your cargo area can save a trip, avoid a long wait at chain checkpoints, and give you an option if conditions become worse than expected. For many DIY car owners, that peace of mind alone makes them worth buying.

Who May Not Need Snow Chains Regularly

Not every driver needs to own chains. If you live in a flat area with light snowfall, roads are quickly plowed, and you avoid driving during storms, chains may spend years unused. The same goes for drivers in warm southern climates who never travel into mountain snow zones.

Also, if your vehicle already runs dedicated winter tires and you mainly stay on maintained city streets, chains may only be necessary for unusual travel situations. In that case, you may still want to carry a set for emergency trips rather than treating them as routine equipment.

• Urban drivers in areas with rapid snow removal
• Drivers who avoid travel during active storms
• Vehicles used mostly on flat, short-distance commutes
• Owners with winter tires who rarely leave maintained roads

Snow Chains Versus Winter Tires and AWD

One of the biggest misconceptions is that AWD or 4WD makes chains unnecessary. AWD helps distribute power, but it does not create traction where none exists. Winter tires improve grip in cold weather and snow, but chain-level traction can still be needed on severe grades or ice.

How They Compare

• All-season tires: workable in light winter weather, but limited in severe snow and ice
• Winter tires: better rubber compound and tread for cold temperatures and snow
• AWD/4WD: helps you get moving, but does not replace tire grip or improve braking as much as people assume
• Snow chains: best short-term traction aid for extreme conditions and chain-control compliance

For regular winter driving, winter tires are usually the better everyday solution. For occasional snow travel, emergency preparation, or legal compliance on mountain roads, chains make more sense. Many drivers use both: winter tires for the season and chains as backup when roads get especially bad.

How to Know if Your Vehicle Can Use Chains

Before buying anything, check your owner’s manual. Some vehicles, especially those with limited wheel-well clearance, low-profile tires, large wheels, or certain suspension and brake setups, may restrict chain use or require a low-clearance chain design. Installing the wrong style can damage the fender liners, brakes, struts, or wheel components.

Check These Before Buying

• Exact tire size currently installed on your vehicle
• Whether the manufacturer allows chains, cables, or only low-profile traction devices
• Which axle should receive chains on your drivetrain layout
• Any speed limits specified by the chain maker or your vehicle manufacturer
• Clearance around the tire, suspension, and inner wheel well

Front-wheel-drive vehicles typically use chains on the front tires. Rear-wheel-drive vehicles typically use them on the rear. AWD and 4WD vehicles may still specify one axle unless the manufacturer approves all four. The owner’s manual should always override generic advice.

Signs You Should Carry Snow Chains in Your Vehicle

If you are unsure whether chains belong on your must-have gear list, a few real-world clues can make the answer obvious.

• You have had to cancel or delay winter trips because traction requirements changed
• You regularly see chain-control notices on the routes you drive
• Your vehicle struggles on snowy hills even with careful driving
• You keep emergency gear in winter but have no traction device
• You travel in areas where cell service is weak and weather changes quickly
• You rely on one vehicle and cannot afford getting stuck far from home

In those situations, chains are less of a luxury and more of a practical backup tool. They may only be used once every few years, but that one use can be the difference between reaching your destination and waiting roadside in dangerous weather.

What to Practice Before You Actually Need Them

The worst time to learn how to install snow chains is on the shoulder of a freezing highway with traffic spraying slush past your door. If you buy chains, do a dry practice installation at home before the season starts.

Smart Prep Steps

• Test-fit the chains in your driveway on a dry day
• Read the instructions and keep them in the storage case
• Pack waterproof gloves, a kneeling pad, and a flashlight
• After installing, drive a short distance and recheck tension
• Remove chains promptly once you reach clear pavement

Most chain damage and fitment problems happen because the wrong size was purchased or the chains were never tested in advance. A few minutes of practice can prevent frustration and roadside mistakes later.

Bottom Line: Do You Need Snow Chains?

You need snow chains if your route takes you into areas with chain-control laws, severe winter storms, steep mountain roads, or conditions that regularly overwhelm your current tires. You should strongly consider carrying them if you drive in snow only occasionally but cannot risk getting stranded or turned around.

If you stay on well-maintained city roads and avoid winter travel during storms, you may not need them often. But for drivers who head into the mountains, deal with unpredictable weather, or want a reliable traction backup, snow chains are one of the most useful seasonal accessories you can keep in the vehicle.

Related Buying Guides

Check out the Snow Chains Buying Guides

FAQ

Are Snow Chains Required on AWD or 4WD Vehicles?

Sometimes, yes. AWD and 4WD can be exempt in lighter chain-control levels if equipped with proper snow-rated tires, but stricter conditions may still require carrying or installing chains. Always check the posted road rules for your route.

Do I Need Snow Chains if I Already Have Winter Tires?

Not always, but possibly. Winter tires are better for everyday cold-weather driving, while chains are for severe snow, ice, steep grades, or legal chain-control situations. Many drivers with winter tires still carry chains as backup.

Can I Use Snow Chains on Any Vehicle?

No. Some vehicles have limited tire clearance or manufacturer restrictions that only allow certain low-profile chains or cables, and some may advise against chains entirely on specific tire and wheel combinations. Check your owner’s manual before buying.

How Fast Can You Drive with Snow Chains On?

You should drive slowly and follow the chain manufacturer’s speed rating, which is often around 25 to 30 mph. Driving too fast can break the chains and damage your vehicle.

Should I Buy Chains if I Only See Snow Once or Twice a Year?

If those trips involve mountain passes, ski travel, rural roads, or areas with chain controls, yes, they are usually worth carrying. For occasional snow in flat urban areas, they may be less necessary.

Where Do Snow Chains Go on the Vehicle?

They typically go on the drive wheels: front tires for front-wheel drive and rear tires for rear-wheel drive. AWD and 4WD vehicles may have specific instructions from the manufacturer, so always verify in the owner’s manual.

What Is the Difference Between Chains and Cables?

Traditional chains often provide stronger traction in deep snow and ice, while cables are usually lighter and may fit vehicles with tighter clearance. The right choice depends on your tire clearance, vehicle restrictions, and the conditions you expect to drive in.