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Caltrans Says I Need Tire Chains…Now What?

POSTED by Golden Bear Cottages Resort: 12/28/21

We're here to answer all your questions about getting prepped for winter driving.

It's winter, and a chilly storm has brought fresh snowfall to the San Bernardino Mountains. Opportunities abound for skiing, snowshoeing, and tubing making a getaway to Big Bear Lake an absolute must. While you're planning for fun, it's important to consider the realities of traveling in winter conditions.


1. Do I really need chains? It's not even snowing.

Yes. You will need to carry tire chains in your vehicle from November 1 to April 30 whether or not you actually use them. When CalTrans calls for chain restrictions, you will need to adhere to chain requirements. See Question 12 for levels of chain control.

"As defined in Section 605 of the California Vehicle Code (CVC), tire traction devices are designed to improve vehicle traction, braking, and cornering upon snow or ice-covered surfaces."

Road conditions and chain restrictions can be found on the 
Caltrans Quickmaps website. It is recommended that you stay up to date with road conditions as they can change quickly and without warning.

2. How do I find the right chains for my tires?

Check your vehicle's owner manual and your tires for specifications on tire chains. It's important to buy chains or other traction that are the correct size for your tires. Link-type chains that are too big will bang against the body of your vehicle causing significant damage.

3. Where can I find tire chains and traction devices?

Chains are sold at most auto supply shops, hardware stores, Walmart and some convenience stores. Call the store ahead of time to check the type of chains they carry. Stock sells out quickly when snowy conditions exist and a vast majority of stores only sell chains and will not rent. Purchase chains before heading to mountain regions!

4. What kinds of traction devices are there?

Apart from link-type tire chains, Alternative Traction Devices include metal cable chains like AutoSocks. It's important to refer to your vehicle's manufacturer guide for guidance on chain/traction sizing and specifications. Caltrans and California Highway Patrol reserve the right to prohibit any vehicle from entering a chain control area if it's determined that traction devices do not meet CVC, Section 605 requirements.

5. Which tires do I put chains/traction devices on?

Chains and traction devices need to be installed on the wheels of your drive axle. Refer to your vehicle guide to determine if your vehicle is front axle or rear axle drive. All-wheel drive vehicles and 4-wheel drive vehicles may have chains installed on either drive axle, but the rear axle is preferred unless the vehicle manufacturer recommends the front axle.

6. How do you even put chains/traction devices on?

The instructions in your tire chain kit will give you a step by step. However, if you're a visual learner, YouTube has some great, easy-to-follow, tutorials.

7. How fast can I drive with tire chains?

Generally, 20 to 25 mph is the recommended speed limit for driving with snow chains. This helps prevent chains from breaking and from potentially damaging your vehicle.

8. Can studded tires and snow tires replace the need to carry/install chains?

No. Although studded tires are legal in California from Nov. 1 until Apr. 30 each year, studded tires are not considered tire traction devices and may not be used in lieu of chains. Snow tires have the designation "Mud & Snow" or an abbreviation such as "M-S," "M+S," or "M/S" marked on the tire sidewall. Tires without this designation are not considered snow tires. Same as studded tires, snow tires may not be used in lieu of chains.

9. My car rental company won't let me put chains on. Am I excused?

No. Some car rental companies may not allow chains on their inventory for various reasons, however this does not excuse you from carrying them or installing them if Caltrans requires it. The best bet if you're worried about snowy roads is to rent either an all-wheel drive or 4-wheel drive vehicle for your journey.

10. The manufacturer of my vehicle recommends that chains not be installed on it. Do I still have to carry/wear chains?

Yes. Many vehicles that don't accommodate conventional link-type chains may accommodate Alternative Traction Devices. Bottom line, if chain control is in effect, you must comply for your safety and the safety of others.

11. What do the chain control statuses mean? R1, R2, etc.?

R1: Chains are required on all vehicles except passenger vehicles and light-duty trucks under 6,000 pounds gross weight and equipped with snow tires on at least two drive wheels. Chains must be carried by vehicles using snow tires. All vehicles towing trailers must have chains on one drive axle. Trailers with brakes must have chains on at least one axle.

R2: Chains are required on all vehicles except four-wheel-drive vehicles under 6,500 pounds gross weight and equipped with snow tires on all four wheels. Chains for one set of drive wheels must be carried by four-wheel-drive vehicles using snow tires.

R3: Chains are required on all vehicles without exception.

Things to Remember

  • It is recommended that you carry extra supplies in your vehicles such as a jack, a shovel, kitty litter, and ice scrapers to help manage snow/ice conditions.
  • It is best to travel on a full tank of gas in case you need to reroute, and it is recommended that you keep your phone charged in case you need help.
·         The City of Big Bear Lake the Big Bear Municipal Water District wants to remind everyone of the dangers of walking on lake ice for both you, your children and your pets. Not only can it cost you your life, it can cost you money and jeopardize the safety of rescuers.

·         STAY OFF LAKE ICE - it's against the law.

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