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  4. On Road Only
  5. Steel Square Link
  6. Drape Over Tire - Make Connections
pewag Servo RS Self-Tensioning Snow Tire Chains - 1 Pair

pewag Servo RS Self-Tensioning Snow Tire Chains - 1 Pair

Item # PWRS79
Retail:$218.40
Our Price: $187.19
You Save: $31.21
Tire Chains

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With their square links and diagonal pattern, these easy-to-install, self-tensioning, alloy steel chains offer superior traction and a smooth ride. Specially designed for vehicles with limited wheel well clearance. Lowest Prices for the best tire chains from pewag. pewag Servo RS Self-Tensioning Snow Tire Chains - 1 Pair part number PWRS79 can be ordered online at etrailer.com or call 1-833-496-1390 for expert service.
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  • Reviews (45)
  • Q & A (0)
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  • Why etrailer?

pewag Tire Chains - PWRS79

  • Tire Chains
  • On Road Only
  • Steel Square Link
  • Drape Over Tire - Make Connections
  • Deep Snow
  • Automatic
  • Class S Compatible
  • pewag
  • Rim Protection

With their square links and diagonal pattern, these easy-to-install, self-tensioning, alloy steel chains offer superior traction and a smooth ride. Specially designed for vehicles with limited wheel well clearance.


Features:

  • Patented tensioning system self-tightens during installation - no manual tensioning needed
    • Simply make the required connections and engage the ratcheting servo device to perfectly fit each chain
  • TITANGrip steel wears well and provides excellent durability
    • Titanium alloy steel construction is strong and corrosion resistant
  • Diagonal pattern delivers a smooth ride
  • Square links offer superior grip and traction
  • Plastic bumpers provide rim protection - no scuffs or scratches
  • Low-profile design is perfect for passenger cars with limited clearance in the wheel well
    • SAE Class S tire chains
  • Convenient fit - works on both front- and rear-wheel-drive vehicles


Specs:

  • Fits: 15" - 20" tires (for exact sizes, see below)
  • Link thickness: 3.2 mm
  • Quantity: 2 chains
  • 90-Day warranty


Note: Consult your owner's manual to determine whether or not snow chains can be used on your vehicle.


pewag Servo RS Installation Instructions

How to Install pewag Servo RS Snow Chains

  1. Spread the chain around the back of the tire.
  2. Connect the cable on the back side of the tire.
  3. Pull the chain over the top and around to the front of the tire. Connect the servo device to the inner, tensioning chain with the top-mounted, dual hook.
  4. Fit the chain around the tire, making sure that the servo is in the front.
  5. Connect the inner chain to the outer traction chain at the bottom of the tire using the large red hook.
  6. Activate the servo device to ratchet the chain tightly into place.

Class S Designation

SAE Class S tire chains are designed for use on vehicles with restricted wheel well clearance. Certain newer cars, vans and small trucks, especially those with large, aftermarket tires, may require the use of Class S chains.

SAE Class S Clearance Diagram

These chains will fit your tires provided there is both:

  • A - a minimum of 1.46" (37 mm) between the top of the tire tread and the wheel well
  • B - at least 0.59" (15 mm) between the tire's sidewall and the vehicle itself

How to Choose Snow Chains for Your Vehicle

To choose the right snow chains, you must match your tire size. Those measurements can be found on the side of your tire, as shown below.


Tire size on sidewall

185/60-15

  1. (185) - indicates the width
  2. (60) - gives you the aspect ratio (sidewall height as percentage of width)
  3. (15) - denotes the diameter of the wheel rim in inches


02940 pewag Servo RS Self-Tightening Chains - Passenger Car Vehicles - Qty 2

Replaces pewag RS79




These chains fit the following tire sizes:

  • 205/75-17.5
  • 215/80-16
  • 225/65-17
  • 225/70-16
  • 225/75-16
  • 225/80-15
  • 235/55-18
  • 235/70-15
  • 235/75-15
  • 245/50-18
  • 245/55-17
  • 255/50-17

Customer Satisfaction Score:


Customer Reviews

pewag Servo RS Self-Tensioning Snow Tire Chains - 1 Pair - PWRS79

Average Customer Rating:  4.7 out of 5 stars   (45 Customer Reviews)

With their square links and diagonal pattern, these easy-to-install, self-tensioning, alloy steel chains offer superior traction and a smooth ride. Specially designed for vehicles with limited wheel well clearance.

by:

Review from a similar Servo RS in Tire Chains


It was my first time buying tire chains, and I'm glad I got them when I did. Practicing three times was enough to learn to put them on and off quickly. I drove through two blizzards with the chains. I also risked going through snow without them and got stuck, so I had to shovel my way out and try to put the chains on, which was not easy. Eventually, when I got them on, I quickly got out of the parking lot I got myself stuck in. I recommend getting them if you're expecting heavy snow because you can feel the traction, and your confidence level when on the snow is very high.




by:

Review from a similar Servo RS in Tire Chains


Didn’t fit the winter tires of my Subaru Forester 2018.
But since I but the chains in autumn it was too late to return them anymore.
Customer service was also useless. Asked tu about adequate sizing and they said I should call Pewag.
Actual chains are great quality and easy system.


Comments
You mentioned that they were not a fit for your snow tires. I have a few questions that I would like to ask. What is the size of the tires? Would you be able to send a picture on how they do not fit? Did you reach out to Pewag?
-- Etrailer Expert Jenny N - 11/07/2022


by:

Review from a similar Servo RS in Tire Chains


We used these chains going up to Truckee and they were the easiest chains we’ve ever installed. Highly recommended!




by:

Review from a similar Servo RS in Tire Chains


Excellent ordering and delivery process. The product (Pewag RS Self-Tensioning Snow Tire Chains) arrived sooner than I had expected. I have not installed them yet but they appear to be highest quality and sturdy, substantial weight.




by:

Review from a similar Servo RS in Tire Chains


Used the chains to pull people on my road during snow storm last year. One lady was stuck so bad tow truck was gonna charge her $250 to get her out. Backed down a ice covered hill, hooked ip and never spun getting her out. Recommend these to all




by:

Review from a similar Servo RS in Tire Chains


I have never been more pleased with a purchase decision than I am with these snow chains. They fit my car perfectly and were easier to install than I expected. If you have ever used on-ground cable chains, you know there are three connections that must be made, plus any adjustments to the tension device. With these chains, the connections are easy and the self-tightening tension device is impressive. At first I was not interested in this feature, but after using it I can appreciate how it will keep the chains tight and secure. I was also impressed by the design of the carrying case. I expected it would be difficult to replace the chains in the case once removed. Wrong. They easily fit back into the handy plastic case. Further, the chains came with plastic gloves to slip over your your hands (even with winter gloves) to keep your hands and lower arms clean. It's a bit odd to be so excited about a product that I hope NOT to use. But I drive to ski resorts all over the West and encounter chain restrictions often. Although I have all-wheel drive, I don't have snow tires and recent chain restrictions in Mammoth, CA require chains or 4-WD with snow tires on all wheels. Now, I'm actually looking forward to using the chains. I'm so pleased, I may purchase a second set for my wife's car. Finally, etrailer.com was great too work with. Their rep ( thanks Donna!) helped me find the right size chains for my wheels. Thanks so much!


Comments
Very well designed product. Service person was very helpful in ing the correct size. I expect to buy the same brand of chains from you for my wifes car.
Arlo S - 01/26/2018


by:

Review from a similar Servo RS in Tire Chains


Great product. Does the job but hardly takes up any space in the back of a Kia Soul.
The storage case came with one broken snap closure, but Etrailer jumped right on it it and replaced the case. Now that is customer service!




by:

Review from a similar Servo RS in Tire Chains


Very good. Relatively quick to mount. It helps if you practice it once before the first use. I use them on a Toyota Corolla. Would buy them again.




by:

Review from a similar Servo RS in Tire Chains


First, I thought reviews were about using the product (Pewag tire chains); not about giving it 4 stars before you even took it out of the box.
Now for a review from some one who actually put them on a tire. They are certainly a big improvement in tire chains. But if you are putting them on a sedan with limited wheel-well access you better do it first in your garage. The inside hook is a disaster to connect; especially, with limited access and visibility. The inside hook definitely need to be replaced with something simpler to connect the two ends of the inside chain together. My reason for a 3 star rating.
Next, to get the chains properly laid out on the tire takes some doing. That said, the cable on the auto tensioner need to be a 1/4” longer. That’s right, the difference between and easy connection of the auto tensioner and 5 minutes spent trying to get the chain ends closer.
Finally, and really, really important, is how you remove the chains. Once you disconnect the chains, you do not want to just drop the chains off the back of the tire. There is a lot of chain and the auto tension cable to catch on some part of the front suspension preventing you from removing the chain. This ability to catch on something is aided by the plastic circular-shaped tubes that hold the back chain in a circle. I know; because it happened to me. O no! I thought for a while I was going to have to remove the tire to unhook the chain. Fortunately, I was able to reach over the tire and unhook the auto-tension cable that was hooked around a part of the car’s front suspension.




by:

Review from a similar Servo RS in Tire Chains


Outstanding product! Very well-designed tire chain, quality components, easy to install, and terrific grip.

I researched this purchase from some time and paid a little more for this quality product. We live in an area with very steep hills and quite a bit of snow and ice that goes unmanaged by the city. I figured these chains would be easy to install (I didn't look a the instructions before I took them out to put them on and had them on in 11 minutes), last a long time, not cause damage to my Lexus SUV, and provide excellent traction. They meet all my expectations.




by:

Review from a similar Servo RS in Tire Chains


So easy to put on, and worked great! Literally 5 mins on and off.

My only issue is the "ikea"type instructions, with images only. I had to find someone with the same chains on the side of the road to help me. Once he showed me, it's easy as pie.




by:

Review from a similar Servo RS in Tire Chains


I haven't used these yet, but I am very familiar with chains in general. I bought these to put on my wife's car, and wanted something easy for her to use. We put them on to teach her, and she was able to put them on pretty easily. I have used pewag truck tire chains, and if these are anything like them, they are great. 4 stars for ease of use. When I do use them, I'll update this review.




by:

Review from a similar Servo RS in Tire Chains


Great price, fast delivery and a great product. You made buying my Pewag chains an easy decision.




by:

Review from a similar Servo RS in Tire Chains


The package came on time as you said it would! The directions were pictures with little text in a vinyl/plastic insert that fits nicely in the case. Watching the video helped a lot, should have looked at first before I installed one. I did it right but the video made it faster the second time! The case is compact and has a rigid separator plate that keeps the two chains separate.
The service on the telephone was superb rate it a 10. This was reassuring since their are so many choices.
The chains fit like a glove and now I hope I never need them!




by:

Review from a similar Servo RS in Tire Chains


I am thoroughly impressed with chains! Used them on multiple occasions, fairly easy installation and remove. Excellent traction, and works great for Ford Fiesta.




by:

Review from a similar Servo RS in Tire Chains


There are many types of tire chains available today. When you want reliable, relatively easy to install chains, this is a great choice. In addition, it appears that they will wear well.

There is no available reliable data available on the strength of tire chains when high levels of horsepower are delivered through them. My personal experience is that my 300 hp pickup can easily break chains in this design category. I have never broken link chains with cam tighteners. Those conditions require the chain to be very snug. No looseness can be permitted.

The link chains fail when hopping takes place. Little doubt that will be true for these as well. Avoiding hopping requires high skill and the willingness to say, I am turning around and going back. Given the chain design, it does run very smoothly. This will minimize the likelihood of hopping.




by:

Review from a similar Servo RS in Tire Chains


I have a 2015 Ford Cmax which in the manual states that no chains or cables are to be used due to limited clearance. I bought these anyway and have used them twice with no issues. I hate putting on chains or cables but these are fairly easy. The advantage to these is that they can be put on without moving the car. First time was on a steep driveway, second on a mountain turnout with deep snow. They auto tensioned as described and a fairly smooth ride compared to typical cables or chains. Your video convinced me to try them even though Ford doesn't recommend anything...which means I'd have to use a different car to go skiing.





by:

Review from a similar Servo RS in Tire Chains


Very easy to put on! Fairly easy to take off. No idea why I drove around with those crappy cables for the last few years - LOL. These chains require very little effort and store easily in the bag and work extremely well. Very happy with them.




by:

Review from a similar Servo RS in Tire Chains


Simply amazing. It took me only 5 minutes (or maybe less) to install and un-install one tire in my garage as a test. Best product and the best offer. Thank you very much. Oh, delivery was also excellent, its timing and the way it been delivered.
Highly Recommend.




by:

Review from a similar Servo RS in Tire Chains


Excellent and easy to install snow chains! Five minute install. Perfect for driving on ice and slick roads where my UHP-All Season tires don't work well.




by:

Review from a similar Servo RS in Tire Chains


Received the tire chains today. No adverse driving conditions to test them on. Will put them on tires this weekend - to check for fit and to practice installation instead of when they are needed.




by:

Review from a similar Servo RS in Tire Chains


Their customer service is awesome!! They reached out to me via email as soon as they noticed delay and kept me updated on the delivery status, and also followed up after the delivery. We now have the chains we need for winter weather! We are very pleased to finally find the right snow chain for our tire size after looking around for 2 years! (235/40 R19, very little clearance)




by:

Review from a similar Servo RS in Tire Chains


I haven't been able to use the product yet (no snow for snow chains) but I liked the website very much and the product came quickly and accurately, with a follow up email.




by:

Review from a similar Servo RS in Tire Chains


My buddy recommended me this product. It works very well for him, he’s driven around Brianhead Utah countless times with these tire chains.




by:

Review from a similar Servo RS in Tire Chains


These are great quick and easy to install and don't require a roll over. Installed them at 0010 with a headlamp on a steep icy hill after sliding 75ft without them.



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See what our Experts say about this pewag Tire Chains

  • Do Pewag PWRS79 Servo Tire Chains Carry a Speed Restriction
    You wouldn't want to drive any faster than 30 mph with Pewag # PWRS79 Pewag Servo installed. The same would hold true with any tire chain. One of the main reasons for this speed prohibition is the fact that if the chain should fail, it would sling around and severely damage the vehicle. I've linked to a demonstration video for the Pewag # PWRS79 Servo Snow Chains.
    view full answer...
  • Do Tire Chains for 2022 Subaru Outback Wagon Work with ABS and AWD
    The tire chains part # PWRS79 that fit the tire size of 225/65-17 that you have on your 2022 Subaru Outback Wagon are totally fine to use with AWD vehicles with ABS systems. Like with any winter driving your ABS system is probably going to be working differently in the snow but the chains will give you a ton more traction. AWD is not an issue at all. I attached an install video for these chains on a similar Outback for you to check out as well.
    view full answer...
  • Tire Chains Recommendation For A 2022 Subaru Outback Wagon
    For your 2022 Subaru Outback Wagon, I recommend the pewag Servo RS Self-Tensioning Snow Tire Chains # PWRS79. These chains are self tensioning, meaning it will self tighten during installation, so there is no manual tensioning needed. These chains will also work great in deep snow, that will provide superior traction and a smooth ride.
    view full answer...
  • What Tires on 2019 Subaru Outback Should Tire Chains be Used on
    I used a search engine to look up the owner's manual of your 2019 Subaru Outback and it stated on page 8-12 to use a traction device on the front wheels only, so you do not need chains for all four wheels. It also states you need to use a Class S traction device to ensure clearance and that you can't use normal steel chains, but you can use self-tensioning chains (these will be tight around your tire which means they will give you the clearance needed not to hit your Outback's wheel well). The...
    view full answer...
  • Recommended Snow Cable Tire Chains for 2018 Subaru Outback Wagon
    The owner's manual for your 2018 Subaru Outback specifically states that traditional chain link style Tire Chains should not be used because of the lack of clearance to the wheel well and between the inside of the wheel well and the suspension/braking components. It goes on to say that Class S cable chains are acceptable, and should only be used on the front wheels. I'd recommend going with the Titan Chain # TC343DC Diagonal allow Cable Snow Chains, which is a fit for your tire size. The...
    view full answer...
  • Recommended Tire Chains for 2018 Subaru Outback Wagon
    I took a look at the online version of the owner's manual for your 2018 Subaru Outback and it does state that the vehicle has very limited wheel well clearance. This means you will want to go with a tire chain set that is Class S compatible, which simply indicates that they are specifically designed for vehicles like yours and will require very little clearance to install. It also states that traction devices should only be used on the front tires. I do recommend checking your copy of...
    view full answer...
  • Recommended Snow Tire Chains for 2019 Subaru Outback with 225/65R17 Tires
    When the law requires use of snow chains, it trumps the manufacturer. So in these cases, I recommend using Class S chains which are minimal clearance chains to give you traction and yet avoid issues with internal clearances. For your 225/65R17 tires on your 2019 Subaru Outback, I recommend the Pewag Servo RS Self-Tensioning Snow Tire Chains - 1 Pair # PWRS79. These chains will install easy and will require only 15 mm or .59 inches of internal clearance between the tire's sidewall and...
    view full answer...

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Info for this part was:

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Expert Research:
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Edited by:
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Video Edited:
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