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1991 Mercedes-Benz 300CE
pewag
pewag Servo RS Tire Chains - Diamond Pattern - Square Links - Self Tensioning - 1 Pair
Part Number: PWRS77
In Stock
$201.44
Retail:$229.95
You Save: $28.51
1991 Mercedes-Benz 300CE
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- Reviews (182)
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pewag Tire Chains - PWRS77
Highlights
- Custom Fit for Your Vehicle: Chains made to match your tire size for a snug fit
- Quick One-Step Mounting: Just connect and flip the switch—chains tension automatically as you drive.
- Solid Grip on Snow and Ice: Diamond pattern with 3.2 mm square links bites in for steady traction.
- Smooth, Centered Ride: Self-centering design keeps chains snug and balanced for less vibration.
- Built for Tight Clearance: SAE Class S compatible—needs only 15 mm of internal space.
- Long-Lasting Strength: Titanium-alloy steel resists rust and wear for repeated winter use.
Features to know about
Tackling Steep, Snowy Roads: Diamond Pattern Keeps You Moving
When the road turns slick or the grade gets steep, these chains grip with a diamond pattern that keeps traction constant across every turn of the wheel. The square links dig into snow and light ice while keeping the ride smooth, so you stay steady whether you’re heading up a mountain road or dealing with deep slush in town.
No Need to Re-Tighten in the Cold: Servo System Self-Tensions as You Drive
Getting out of the car to stop and retighten chains is the last thing anyone wants to do in freezing weather. With these, you don’t have to. Just connect them, flip the servo ratcheting switch to “drive,” and roll forward. The built-in self-tensioning system automatically centers and tightens for a perfect fit while you drive, keeping the chains snug the entire time.
Fitting in Tight Wheel Wells: Class S Compatible Low-Profile Build
If your car doesn’t leave much space around the tires, these are designed to fit where others won’t. They meet SAE Class S clearance requirements with only 15 mm of needed space on the inside. That makes them a solid option for vehicles with limited wheel-well clearance while still giving you dependable winter traction.
Built to Last Through Winter: Titanium Alloy Steel Resists Corrosion
Snow, salt, and moisture can wreck cheap chains fast. These are made from high-quality titanium alloy steel that stands up to corrosion and stays strong season after season. The 3.2 mm square links provide a good bite without making the ride harsh, so you get both durability and comfort when the weather turns rough.
Ready When You Are: Compact Storage and Protective Details
After use, the chains fit easily back into their sturdy plastic case so they’re always organized and ready for the next trip. Plastic bumpers protect your wheel rims, and the lightweight build makes them easy to carry and store. It’s a setup made for drivers who want reliable traction without the extra bulk.
Specs
Fit
- Fits: 14" - 18" tires (for exact sizes, see below)
- 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
Construction
- Link thickness: 3.2 mm
- Material: High-quality titanium alloy steel
Quantity
- Quantity: 2 chains
Warranty
- Warranty: 90-Day warranty
Note
- Note: To determine whether you can use snow chains on your vehicle, and how they may affect your ABS/EPS functionality, consult your owner's manual.
Confirming Your Fit
If you know your tire size, you may think you won't need to test fit your new chains. But there are a lot of variables that can affect whether chains will fit your specific tires, including your tire type, the amount of air pressure in the tire, the amount of tread wear, and the tire manufacturer.We recommend that you order chains as early in the season as possible to give yourself plenty of time to test fit the chains and reorder if needed. This way, you won't be stuck out in the cold later with snow chains that don't fit.
You can test fit these chains in your garage or driveway, but you'll want to wait until there's snow on the ground to actually drive with them. Likewise, if you're out in the snow and come across bare pavement, you'll want to pull over and remove the chains. These chains can cause damage to the bare pavement, your garage floor, or your vehicle if they break from the wear of riding on a harsh surface.
RS 77 pewag Servo RS Self-Tightening Chains - Passenger Vehicles - 14" to 18" Tires
Replaces pewag SMX 77, SMX77, and 37045
These chains fit the following tire sizes:
- 195/85-16
- 195/85-16S
- 205/70-17.5
- 205/70-17.5S
- 205/80-16
- 205/80-16S
- 215/60-17
- 215/60-17S
- 215/70-16
- 215/70-16S
- 215/75-16
- 215/75-16S
- 215/80-15
- 215/80-15S
- 225/55-18
- 225/55-18S
- 225/60-17
- 225/60-17S
- 225/80-14
- 225/80-14S
- 235/40-19
- 235/40-19S
- 235/50-18
- 235/50-18S
- 235/55-17
- 235/55-17S
- 235/60-16
- 235/60-16S
- 235/70-14
- 235/70-14S
- 245/45-18
- 245/45-18S
- 245/50-17
- 245/50-17S
- 245/55-16
- 245/55-16S
- 255/50-16
- 255/50-16S
- 255/60-15
- 255/60-15S
- 265/60-14
- 265/60-14S
- 275/50-15
- 275/50-15S
- 7.00x15
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
- Wrong item was ordered
Ratings & Reviews
4.5
182 reviews
by:
Michelle D.
02/09/2026
Subaru
Forester
Am an elder, live in So Cal mountains. Easy for me, at 74yrs, to install on my 2020 Subaru Forester. Thank you for good product, understandable video and great customer service.
by:
Arlo S.
01/26/2017
2013
Audi
Allroad
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!
by:
Inga
11/02/2022
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.
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.
Jenny N.
11/7/2022
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?
by:
Christopher
10/26/2023
These chains were invaluable last winter during our big snow storm and thereafter. They are great chains. The only reason I'm not giving 5 starts is that I previously had pretty much the same ones for the 17" wheels on my last vehicle and the hooking mechanism was better on those. This one is rather difficult to hook together at the first attachment point. Otherwise I would definitely recommend these.
by:
JJ
12/26/2018
2015
Volvo
V60
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:
Michael
10/16/2021
Great price, fast delivery and a great product. You made buying my Pewag chains an easy decision.
by:
Ronald
10/03/2021
by:
Dale
12/07/2023
by:
Scott
12/12/2022
2016
Honda
Accord
by:
Kurtis
12/05/2023
by:
Jeannine
09/24/2026
I am not very handy and have no intention of installing my chains on the side of the interstate myself if I can help it. I chose these because they are self-tensioning and can be put on without laying on the ground to install them. I tested installing them twice at home, so I am ready in case of emergency when I visit the seirra's this winter.
by:
Qingyu
01/15/2025
My Mazda 3's tires are right at the top of the size range, 215/45/R18, and the tire chains fit! It was a bit hard to get them on, though. After fitting the chains loosely, we were struggling to lock the final hooks.
To lock the hooks, we ended up using one of the spare chains that came in the packaging to bridge that final 1-2 inches. Then, we drove a couple inches forward (until the we could hear the self tensioner click a couple times), and that gave us enough slack to connect the hooks without the spare chain.
I do not recommend using the spare chain to actually drive, unless they're professionally welded/attached, but they were super helpful for fitting the chains properly.
Image shows the chains mounted and the hooks properly attached, but with the auto-tensioner off.
To lock the hooks, we ended up using one of the spare chains that came in the packaging to bridge that final 1-2 inches. Then, we drove a couple inches forward (until the we could hear the self tensioner click a couple times), and that gave us enough slack to connect the hooks without the spare chain.
I do not recommend using the spare chain to actually drive, unless they're professionally welded/attached, but they were super helpful for fitting the chains properly.
Image shows the chains mounted and the hooks properly attached, but with the auto-tensioner off.
by:
Matthew
01/24/2026
Volkswagen
Jetta
These are not easy to install with the wheel on the ground on a VW Jetta. I jacked up the car so there was plenty of room to work, and I could spin the tire to make the needed adjustments. Still not easy, but not bad. They work well, or at least as well as I need them to.
by:
Skip
12/16/2017
1996
Chevrolet
Corvette
I drive a 1996 Corvette and have for the past 20 years - year round. And that makes driving near impossible in Connecticut winters and hilly terrains. Until I got my Pewag chains. When the snow accumulates, on go my Pewags and away I go. Snow covered roads, no problem, up and down hills, no problem. I can put my Pewags on both tires in less than ten minutes and I am good to go. Great product! I highly recommend Pewag chains.
by:
Scott
08/27/2023
2023
Toyota
Sienna
Easy to put on! I have a 2023 Toyota Sienna with original tires 235/60R18 and the pewag RS80 fit perfectly. The pictograph instructions were easy to follow and the chains were quick to get on during my test fit. The instructions being in plastic could be helpful if they get wet and I really like the self tensioning aspect of these chains.
A few notes from the Toyota Sienna manual
1. "Vehicles with 17-inch or 18- inch tires Use SAE Class “S” type radial tire chains....Vehicles with 20-inch tires Tire chains cannot be mounted. Snow tires should be used instead."
-These Pewag tire chains are "s" type and the low clearance fit my 18" wheels easily.
2. "The tire pressure warning valves and transmitters may not function correctly when tire chains are fitted."
-If your vehicle cant read your tire pressure and you have chains on...no big deal.
I really liked the ease with which these chains went on and I'm looking forward to seeing how they perform in the snow.
A few notes from the Toyota Sienna manual
1. "Vehicles with 17-inch or 18- inch tires Use SAE Class “S” type radial tire chains....Vehicles with 20-inch tires Tire chains cannot be mounted. Snow tires should be used instead."
-These Pewag tire chains are "s" type and the low clearance fit my 18" wheels easily.
2. "The tire pressure warning valves and transmitters may not function correctly when tire chains are fitted."
-If your vehicle cant read your tire pressure and you have chains on...no big deal.
I really liked the ease with which these chains went on and I'm looking forward to seeing how they perform in the snow.
by:
Brian Ottaway
02/18/2018
Fit snugly. Will be a little difficult in the snow but with a pair of gloves on it is doable. The red plastic rim protectors would protect rim from metal on metal contact. However, with my M-sport rims and Pirelli Cinturato P7 tires, the red plastic doesn't even come into contact with the rim due to the extended lip of the tire...but this does mean that the chain touches the outside surface of the tire--see pics. A little off putting scarring the sticky looking surface of the tire...but it is inevitable.
On the inside of the wheel/tire, my concern was contact with the knuckle, strut, end link, stabilizer, etc. It does get close to the stabilizer end link, but doesn't touch...my pictures are shown before self centering while driving...so the spacing to end link would only get greater as I installed in worst case scenario to compare.
On the inside of the wheel/tire, my concern was contact with the knuckle, strut, end link, stabilizer, etc. It does get close to the stabilizer end link, but doesn't touch...my pictures are shown before self centering while driving...so the spacing to end link would only get greater as I installed in worst case scenario to compare.
by:
David
10/21/2024
I have yet to actually use them but the installation isn't too tricky or complex. Just make sure to follow the instructions on a dry run or two before you think you'll need them ;-)
David
10/22/2025
In the year that I have owned these, I have used them exactly once and I can say that under conditions it can be a bit tricky and at times frustrating. I suspect that additional installations on the side of the road will improve the time and patience it takes to install them. Removal was fairly simple, but putting them back into the case can be a challenge - Do note, they will scuff up your rims, but that can be polished out. One key take away: Everythings easier on a dry run literally dry... lol
by:
Angelique
10/29/2022
These chains are amazing to say the least. 2012 GMC Terrain never needed to put chains on it, but we decided to take it on a snow trip. I have used chains in the past on other vehicles and all have been so hard to put on, on so many different levels. It made me hate to have to use them. Now the Pewag Snox Pro are the best chains I have ever used. WOW!!! They were on in less than 5-10 minutes and then taking them off was even easier. One snap of the lock, a few rough tugs, and pulled forward. Shook them of and packed them back up in the awesome case. Smooth ride considering I had chains on and great traction on snow and ice! I did not know I could love chains so much!
by:
Ricky
11/05/2022
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:
Michael
01/08/2026
While installing the chains for the first time, the tensioner on one of the chains broke. Thankful it happened before I was in a snow storm on a mountain. etrailer was great to work with. Issued my return and refund.
by:
May
12/26/2020
2012
Toyota
RAV4
I got to test them out for the first time after 4 inches of snow going up a long, steep gravel road full of switchbacks and ice patches in Blue Ridge Mountains. They performed wonderfully and were pretty easy to put on. My only concern are the blue plastic parts that could be a weak point.
by:
C. DAVIS
03/14/2017
Subaru
Forester
Purchased these chains for a trip to the snow and for future use after buying a new vehicle. The chains were received promptly in a well designed carrying case, with a mat, gloves, and instructions for mounting the chains. I haven't had to use them = a Subaru Forester is a great AWD vehicle and handled some pretty dicey conditions with no issue - but carry them and feel confident I can mount and dismount them quickly. Instructions are clear and simple to follow.
Clifford D.
3/14/2018
Still havent used them but they are a great security blanket
by:
David
09/18/2023
Chevrolet
Tahoe
The self tensioning feature was what made these chains attractive. After watching the installation video and practicing the installation in dry conditions a few times, I was able to easily install these chains on my Subaru in a ski resort parking lot in South Lake Tahoe, CA in the midst of a snow storm with 8 inches of snow already on the ground. Just needed to clear some of the snow away from around each front tire. Gave me lots of traction to get up and down the mountain roads.
David
9/19/2024
These chains have held up really well. Got the installation process, in stormy snowy conditions, down to 5 minutes or less per wheel. I dont like to rely on the self-tensioning feature so I release the servo and tug on the cable to make sure that the cable is retracted and tightened as much as possible and then I let the self-tensioning feature do its job when I move the vehicle. These chains have gotten me out of my street and to work before the plow comes through the street. Definitely recommend them!
by:
Utah
12/02/2023
These chains are so easy to use and got me out of a few sticky situations last winter - we had an unusually high amount of unforecasted snowfall, and these chains were perfect. I gave this vehicle and the chains to my stepdaughter. Unfortunately, these chains didn't come in my new SUV's size. If they did, I would have bought these again. I did, however, buy my new self-tensioning chains in a similar pattern from the etrailer. I haven't used them yet but great service from etrailer.
Utah
12/3/2024
Still great
by:
Jack
11/15/2023
2005
Ford
Thunderbird
These are for a 2005 Ford Thunderbird and are fantastic! Having had four and all-wheel drive cars for years, these make snow and ice conditions of small issue only needing good driving skills.The ease of installation is perhaps most remarkable taking under ten minutes and drive immediately without any further adjustment. Fit is superb with no impingement in what are very low clearance wheel wells.
Jack
11/26/2024
Having used them but a few times on a vehicle that surely doesn’t belong in the snow I’m amazed. Not by the performance so much but again in the ease of installation. As to performance, chains are chains in that they work as they should. Cable traction devices do not and do not last for beans. It’s perhaps why you see so many pitched off onto the road or someone off the side trying to unwrap them from their axle. These not only do the job but adjust immediately, stay on and take but a few minutes to remove.
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See what our Experts say about this pewag Tire Chains
- What pewag Snow Tire Chains Fit 2023 Tesla Model 3 With 235/40-19 TiresThe correct fit for pewag snow tire chains on your 2023 Tesla Model 3 with 235/40-19 tires are the following: - pewag Servo RS Tire Chains # PWRS77
view full answer... - Speed Rating and Operational Use of Snow Tire ChainsThe Pewag Servo RS Self-Tensioning Tire Chains - 1 Pair # PWRS77 are great quality chains that are not difficult to install. They are made of titanium allow steel which makes them very strong and corrosion resistant. The speed rating for this set of chains is 25-30 mph. This is not just for these chains but is the industry standard. Tire chains are not for use on any roads where the pavement is bare. Using them above that speed or on bare pavement can cause loss of traction and even...
view full answer... - Recommended Tire Chains And Installation On 2004 Toyota SiennaIn your owners manual for your 2004 Toyota Sienna, the online manual states snow tires or chains are recommended when driving on snow or ice. It states to use SAE class S type radial tire chains except radial cable chains or V-bar type chains. You are to use them on the front tires and are given instructions to not use chains on the rear tires. This is according to page 468 of the online 2004 Toyota Sienna manual. For instance, for 215/65-16 tires, I recommend the 2004 Toyota Sienna...
view full answer... - Availability of Pewag RS 77 Tire Chain for 2019 Tesla Model 3Since you are wanting the Pewag RS 77 you actually need our part # PWRS77 as the # PWRS76 is a smaller size.
view full answer... - Recommended Snow Tire Chains For 2017 Volvo V60 With 235/40R19 TiresThe Thule chains you have are great and unfortunately are no longer being made. If you are concerned about the chains, then I recommend the Pewag Servo RS Self-Tensioning Tire Chains # PWRS77 are great for your application. They only require 15mm of internal clearance to operate and that is Class S compatible for minimal clearances. I wouldn't hesitate to use your current chains if they are in good condition. The Pewag option is a replacement recommendation if your chains are not in...
view full answer... - Tire Chains for a 2008 Volvo S-80 AWDWhen a vehicle owner's manual or manufacturer says something like Use only Volvo approved chains that means they want you to buy them from Volvo or a Volvo dealer when in reality they should just tell you what makes chains approved or not. Basically you will need Class S compatible chains or cables because there is limited clearance between the tires and vehicle components. Also, on your vehicle the chains should only be used on the front wheels. If you are able to turn off any type of...
view full answer... - Recommended Tire Chains for 2006 Jaguar XJ With 235/50r18 TiresThe Konig Premium Self-Tensioning Snow Tire Chains # th02230k45 are confirmed to fit your 2006 Jaguar XJ Series with 235/50r18 tires and I do not see any issues with this setup. The only thing I would say is that it takes some time to install these chains, so if you don't plan on keeping them installed for a long time then I would go with a different set of chains. I personally would go with the pewag Servo RS Self-Tensioning Tire Chains - 1 Pair # PWRS77 instead. This offers a much simpler...
view full answer... - Does Pewag Tire Chain # PWRS77 Fit 2018 Honda Accord with 235/40/19 TiresThe Pewag Servo RS Self-Tensioning Tire Chains # PWRS77 that you referenced have been confirmed as a fit for your tire size of 235/40-19. What's more important that the wheel diameter is the overall diameter and width of the tire when fitting the chains and this chain easily fits your tire size.
view full answer...
Do you have a question about this Tire Chain?
Info for this part was:
Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Laura H
Updated by:
Wilson B
Updated by:
Hannah L
Updated by:
Mark S
Updated by:
Isabelle B
Updated by:
Sabrina W
Video Edited:
Dustin K
Video by:
Chris R
Video by:
Aidan B
Installed by:
Adam E
Test Fit:
Matthew B
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Arlo S.
1/26/2018
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.