bing tracking image
Customer Service My Orders
  1. Vehicle Suspension
  2. SuperSprings Intl
  3. Bump Stops
  4. Towing/Load Leveling
  5. Front Axle Suspension Enhancement
  6. Standard Duty
THIS ITEM IS NOT A FIT FOR
2014 Freightliner Sprinter
Special Savings on Select SuperSprings Items. See Cart for Savings.
etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
SCHEDULE AN INSTALLATION
go
SuperSprings Intl

SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle

Part Number: SSF-173-40-2
535 Reviews | 100 Questions
In Stock
$734.99
 Vehicle Suspension
6 used items available at $310.11
Not Confirmed to Fit

2014 Freightliner Sprinter

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Add to cart
Instant Rebate
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

3d view icon
supersprings intl vehicle suspension towing/load leveling ssf-173-40-2
supersprings intl vehicle suspension towing/load leveling bump stops sumosprings rebel custom helper springs - 2 piece front axle
supersprings intl vehicle suspension towing/load leveling bump stops
supersprings intl vehicle suspension towing/load leveling front axle enhancement sumosprings rebel custom helper springs - 2 piece
supersprings intl vehicle suspension bump stops
supersprings intl vehicle suspension bump stops ssf-173-40-2
supersprings intl vehicle suspension towing/load leveling sumosprings rebel custom helper springs - 2 piece front axle

Show All (8) Product Images

Show Fewer Product Images

In Use/Installed

2011 newmar canyon star motorhome vehicle suspension supersprings intl front axle enhancement ssf-173-40-2
2011 newmar canyon star motorhome vehicle suspension supersprings intl towing/load leveling bump stops sumosprings rebel custom helper springs - 2 piece front axle
2011 newmar canyon star motorhome vehicle suspension supersprings intl towing/load leveling front axle enhancement sumosprings rebel custom helper springs - 2 piece
2011 newmar canyon star motorhome vehicle suspension supersprings intl towing/load leveling ssf-173-40-2
2011 newmar canyon star motorhome vehicle suspension supersprings intl towing/load leveling bump stops on a

Show All (5) In Use/Installed

Show Fewer In Use/Installed

Customer Photos

SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo
SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle customer photo

Show All (21) Customer Images

Show Fewer Customer Images

Videos

Show All (24) Videos

Show Fewer Videos

etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
SCHEDULE AN INSTALLATION
go
3,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's front suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle part number SSF-173-40-2 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (535)
  • Q & A (0)
  • Related Parts
  • Photos
  • Used (6)

SuperSprings Intl Vehicle Suspension - SSF-173-40-2

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 3,000-lb Front Load Support: Keeps your vehicle level and steering steady when carrying heavy front-end weight.
  • Smoother Ride Over Bumps: Compresses softly for light loads and firms up to handle rough or uneven roads.
  • No Maintenance Needed: No air lines or pressure checks—just install once and forget about upkeep.
  • Reduces Sway and Body Roll: Each spring works independently to keep handling stable when turning or hitting uneven terrain.
  • Easy Bolt-On Install: Mounts with included hardware for a quick upgrade using common hand tools.
Made in USA

Features to know about

Stay Level and Confident: 3,000-lb Front Suspension Support

Heavy front-end loads like slide-outs or gear can cause sag that throws off steering and braking. These SumoSprings Rebel helper springs add up to 3,000 lbs of support at 50-percent compression to keep the front end level and stable. The microcellular urethane material cushions bumps and absorbs road shock so your ride feels smoother and more controlled even when the weight piles on.

Smooth Ride On or Off the Road: 2-Piece Design with Unlimited Suspension Travel

Uneven pavement or rough terrain can make a heavy vehicle bounce and jar uncomfortably. The two-piece design of these springs lets the suspension move freely when unloaded, separating under light conditions for a soft, comfortable ride. When loaded, the halves meet to deliver full support that keeps suspension travel unrestricted without harshness.

SumoSprings Rebel two-piece front helper springs installed on vehicle frame and axle showing separation for full suspension travel

Adapt to Every Load: Progressive Load Control

Not every trip carries the same weight, and these springs adjust automatically. Lighter loads compress the urethane easily for gentle engagement, while heavier ones push the springs up to 80 percent of their travel for firm support. The result is a steady, even stance whether you’re lightly packed or carrying serious weight.

SumoSprings Rebel helper springs compressing under vehicle load demonstrating progressive suspension support

Stay in Control Through Turns: Independent Spring Action

Body roll and off-center loads can make steering feel loose in curves or gusty conditions. Each SumoSpring works independently to balance side-to-side pressure, keeping handling consistent through turns and crosswinds. That independent movement helps reduce sway and keeps all four tires making solid contact with the road.

Built Tough for Long Service: Durable, Maintenance-Free Design

Road salt, oil, and UV rays can break down weaker materials fast. These microcellular urethane springs resist abrasion and weather damage while performing reliably from -25°F to 200°F. They expand and compress vertically with minimal side movement so nearby parts stay protected. With no air lines or pressure checks to worry about, you bolt them on once and they’re ready for the long haul.

Specs

Weight and Capacity

  • Weight capacity (at 50-percent compression): 3,000 lbs

Warranty

  • Limited lifetime warranty
  • 30-Day satisfaction guarantee

SSF-173-40-2 SuperSprings Sumo Springs Rebel Front Vehicle Suspension Kit for Motor Homes - 2-Piece

Installation Details SSF-173-40-2 Installation instructions

This Product Fits The Following Vehicles






Customers Who Purchased This Vehicle Suspension Also Bought...



Customer Satisfaction Score:

Ratings & Reviews

4.8

535 reviews
5 Stars
(446)
4 Stars
(67)
3 Stars
(9)
2 Stars
(6)
1 Star
(7)
Review Sort Icon
by:
A nice improvement over Fords. etrailer has great service & customer support.
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Kate F. profile picture
Etrailer Expert

Kate F.

5/6/2026

Thanks for the kind words Edd, I love hearing that we are doing things right! Install looks great =)

by:
2024 Ford F-53
Excellant product. RV rides great after installing Sumosprings and Shocks
by:
Inatallation was very easy. There is no air gap between springs which makes them seem to work through all cycles. Haven't road tested them yet so we will see when I do.
Allan profile picture

Allan

3/26/2026

Put quite a few miles on them since purchase. Made a noticeable difference in sway and ride. Would buy again.

by:
2013 GMC Canyon
I ordered this for our 2013 Newmar Canyon Star, and they were not difficult to install. Still need to take it out for a road test, but installation on the front was not bad at all. The video was really helpful with that part. It was my first suspension upgrade, but it was necessary as our bump stops were all but rotted out. The alignment at the top and bottom looks like it's going to be off until you lower it down. Appears to be a very good purchase. Road test will be the final test.
by:
2023 Ford F-53
I installed these front Sumos on my 2023 Ford F53 chassis Class A Tiffin for several reasons. The factory bump stops had fallen out so something needed to be installed. I decided to invest in the Sumos to provide suspension support and get all the benefits of Sumos. I installed them, test drove the coach and am pleased with the results. They help cushion the front end and provide anti roll assistance. They work well with the Konis to soften the natural harshness of leaf springs. I’m very pleased with this addition.
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
by:
Product came in within 3 days or so. Bought SUMO SPRINGS and a steering stabilizer for my 38’ Gas Motorhome and they work wonders. Highly recommed getting these items. . Feels like a different RV. 3rd time or so that I have bought from these guys, always came thru. Happy customer. And I installed front/back sumo springs and stabilizer by myself in 2hrs.
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
by:
The work great! Was going to go with the Air-Ride air bags in the front but folks had noted that the bags are strained when the leveling pulls the front wheels up to the point of coming off the ground. Glad we went with these. The person I put this on for is Handicap (or Handicapable as she says!) and these do not require air or making sure the pressure(s) are correct and holding.
It was a pain in the butttt get the original jounce bumper off the drivers side, but we muscled through it!! Thanks, Amy, for your help in ordering!! v
Customer Large Image
Customer Image
Click to Enlarge
by:
I installed the sumo springs. I followed the directions that came in the box and the video on the web site were very helpful. It took me about 2 hours to install. I am hoping that these springs will help take some of the rough ride out of our motor home as the website and many other users have claimed. I am looking forward to testing them out.
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
by:
Sumo springs arrived today. Very good quality product, straight forward installation took about an hour and a half to install on 2018 Bounder 35p.Have pictures of stock bump stop and new springs, no comparison, installed springs and have pictures with jacks up and jacks down. Only reason I didn’t give them a five star rating is I haven’t driven the motor home yet.
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
by:
First product did not fit waiting on next to try.
by:
2024 Ford F-53
As always e trailer has had the parts I need, there shipping has always been fast, and there customer support team either have the answers or will find the answer. After 20 years they have never let me down with there products or support.
Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

7/10/2025

Wow, this is amazing to hear! We really appreciate you sticking with us all this time. It means a lot to hear that we've been able be part of your journey for so long. Can't wait to hear about what's next

by:
These have made the coach much better in steering,road shock, and swaying. Best money spent so far. Thanks guys
by:
overall a great product, however no one would help me fix my issue with the mounting bracket on the bottom being a year different i need the Plate not the J hooks. Having been a last minute purchase and even with timely delivery.. was out of time to return and exchange the part.

this was not acceptable due to having to leave on the Trip to Idaho.
Neither Sumo spring int or E-tralier would go the little extra distance to ship me just the mounting plates in exchange for the J hooks seems simple enough to meet customer satisfaction issues with a minor fix Since we are supposed to be customer facing for customer satisfaction.

Having to engineer my own mounting bracket out of Plate steel (just imagine how simple this fix is (exchange and deal with the return Later) A simple thing providing the brackets or or swapping out the J hooks would solve this issue. or making a change to the mounting methods in one box.Gee what an idea customer service while solving a problem.

Guess no one is concerned it's your problem now is not an acceptable resolution and are not into Customer satisfaction or making it Right!

even if it was a customer mistake due to being the wrong year for the chassis vs the year of the for CLass A NO one was interested in helping or fixing my Issue. Bummer
by:
Excellent product. I have a 2018 Thor motor home on the Ford chassis. After purchasing it and driving it 100 miles home in sustained 40 mile mph winds, I was starting to regret buying it. Even without wind, it was a handful to drive. I purchased the sumo spring for the front and rear. The change it the handling was way better then I expected. Even in high winds. Nothing will stop all the effects of the wind on a motor home, but I can now drive it 70 mph with confidence. The biggest change was with the side to side rocking. Driving on uneven lanes and on two lane roads with out shoulders is no longer a problem. I installed them myself without removing the tires. You have to use a right angle drill. It took me 5 hours to do it, but I’m 60 years old and slow. I plan on doing other improvements like steering stabilizer and track bar. Adding the sumo spring is the best thing anyone can do to improve handling. I actually enjoy driving my motor home now.
Allan profile picture

Allan

4/26/2020

It worked as expected. Made motor home safer and less stressful to drive.

by:
Abbey V was great thanks. Thanks for all of your help!
by:
Great product easy to install
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Ed profile picture

Ed

9/10/2021

Great

by:
A friend and I installed these, if was not difficult to figure out and was a big savings. My wife noticed the difference without knowing it. On a trip to a frequent location she would complain the entire trip after installation on the same trip she did not complain at all. Success!
Tracy profile picture

Tracy

2/19/2025

Great no change to my original review. I put the the Sumosprings decal on my windshield so others can see what I have to make our ride less jolting.

Jameson C. profile picture
Etrailer Expert

Jameson C.

2/19/2025

@Tracy Glad you like them still! Have you done anything else to improve the ride quality?
by:
Got delivery in a timely manner. All items were as advertised and installation hardware was complete.
The Sumo Springs and heavy duty sway bars made a SIGNIFICANT difference in the ride and handling.
Would have no problem ordering from this company again. They were also very helpful and patient on the phone.
Shel profile picture

Shel

7/13/2020

Sway bars and springs are still working great. They are a necessity for my Ford F-53 chassis.

by:
2019 Ford F-53
Installation hardware did no work for my F53 chassis
Customer Large Image
Customer Image
Click to Enlarge
Katrina D. profile picture
Etrailer Expert

Katrina D.

7/18/2024

After looking into your order, it looks like you have a 2 wheel drive F-53 chassis with a gross vehicle weight of 22,000 lbs. And that may be the issue. It looks like this kit is designed to fit your chassis if the gross vehicle weight is between 24,000 and 26,000 lbs. You will actually need part # SSF-170-40-2. Lets go ahead and get a return label set up for you and a new order placed for the correct part.

by:
E Trailer is the best. The installation videos & photos are priceless.
by:
Missing one bolt, installation instructions are vague. Very pleasant sales experience.
Heather A. profile picture
Etrailer Expert

Heather A.

2/20/2025

Oh man.. did you get the bolt you needed? I can have it sent out to you.

Barry profile picture

Barry

2/20/2025

@HeatherA I purchased one. I had all tools out and a helper, so I went out and bought it. Attention to detail would have prevented this, also aDIY video should be made, by company, instead of relying on backyard mechanics to provide details
Barry profile picture

Barry

2/20/2025

@Barry Just realized that somehow my review got mixed up somehow. It was the Timbren rear that was missing a bolt. Sorry for mix up. It rained after I installed Sumo and the box got soaked, so It was disposed of, Today I realized that I needed that number from that box for warranty registration. Do you by any chance have it on invoice?
Heather A. profile picture
Etrailer Expert

Heather A.

2/20/2025

@Barry Yes let me figure that out for you.
by:
One year ago I installed Sumo Springs front and rear on my class A motorhome. This upgrade is the best suspension add on for improved sway control and overall handling. etrailer helped me make the proper choice based on overall vehicle weight and specific chassis. Fast shipping and fair pricing.
by:
I had the both the front and rear sumo Springs installed on my 2016 Newmar Canyon Star, by the crew at Etrailer.
The improvement in the handling was noticeable the minute I hit the road. The most noticeable effect was the reduction in the top heavy sway when cornering.
It also seems to have reduced the effect of passing semi's .
I would definitely recommend this product to anyone who has a Ford F53 chassis on their motorhome.
by:
One year now, we love our SumoSprings, they helped with the front end dive when applying the brakes & with wind sway. Etrailer was easy to use & the part was shipped on time.
by:
Easy to install, looks great. The drive definitely improved
Customer Large Image
Customer Image
Click to Enlarge
25
535
true
Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

Do you have a question about this Vehicle Suspension?
  • What Front SumoSprings do I Need for My 2017 Thor Class A on a Ford F-53 Chassis?
    Hello Tim, Thanks for writing in, happy to help find the correct SumoSprings for the front axle. You will need to choose from the following depending on what your GVWR is. You can find that rating on the sticker inside the driver’s side door jamb, or sometimes on a plate near the driver’s seat area. If your GVWR is between 16,000 and 22,000 lbs you will want the SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle # SSF-170-40-2. If your GVWR is between 24,000 and 26,000 lbs...
    view full answer...
  • Recommended Suspension Upgrade For A 2021 Newmar Bay Star 3626 Class A Motorhome That Leans
    Typically if your motorhome is leaning one way it just means either the manufacturer or you have it too much loaded on one side, but this could also be an indication that there's an issue with your suspension so I highly recommend everything is is in good shape and that nothing is damaged before adding on anything. Once you know your suspension is in good working order then yes, I definitely recommend installing some SumoSprings. These will give you a much smoother ride over the Timbren's...
    view full answer...
  • Recommended Sumo Springs for 2018 Ford F53 Chassis 24,000 lbs
    The SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle # SSF-173-40-2 will support the load and compress together on your motorhome all the time when there is weight. The split design is a benefit for the individual springs when the suspension travel is greater than what a single non-split design could handle. In other words, when one wheel travels lower on a turn, the spring will not take weight off the wheel so it has more weight in contact with the road for better traction....
    view full answer...
  • Suspension Enhancement for 2021 Forest River Georgetown 36K7 Motorhome
    We can get your 2021 Forest River Georgetown 36K7 set up for a smoother and more controlled ride, and the best way to do that is to add an aftermarket rear anti-sway bar because they are better constructed with higher-strength, thicker steel than OEM sway bars. This means the bars are stronger with much higher roll stiffness to combat sway, and their placement at the rear of the vehicle allows for the greatest improvement in handling. After that, to get the best overall handling, you can...
    view full answer...
  • Recommended Suspension Upgrades for a 2018 Jayco Precept 36T
    The first and most important suspension upgrade you will want to make on your 2018 Jayco Precept 36T is an upgraded rear anti-sway bar, the Roadmaster Rear Anti-Sway Bar part # RM-1139-149. The Roadmaster Rear Anti-Sway Bar is going to help minimize the floating/rocking feeling while out on the highway which is typically the most common complaint with a motorhome and the weakest component from the factory. The second most important suspension upgrade you will want to make is a set of...
    view full answer...
  • What is the Difference Between the Different Color SumoSprings for the 2019 Coachman Mirada 32SS.
    You are correct that the different colors on the SumoSprings Custom Helper Springs like the # SSR-187-54-1 note the different densities of the springs; the yellow springs that you were looking at and are mentioned above are the stiffest compression strength springs available for your 2020 Coachman Mirada 32SS and are the best choice to help reduce the side-to-side sway you're experiencing. For reference, the blue SumoSprings are for light duty applications, the black are designed for...
    view full answer...
  • Best Anti-Sway Bars and SumoSprings for a Forest River Georgetown 360DS On Ford F-53 Chassis
    The most beneficial component that you can add to your motorhome's suspension is a rear anti-sway bar or in your case, an upgraded rear anti-sway bar. For your 2014 Forest River Georgetown 360DS on a Ford F-53 Chassis, I recommend the Roadmaster Rear Anti-Sway Bar part # RM-1139-149 which features a 1-5/8" diameter bar and polyurethane bushings. I have attached an install video for you on a similar motorhome with the same chassis.
    view full answer...
  • Recommended Air Bag Kit for a 2017 Tiffin Allegro Open Road 36LA
    Hey Don, Air Lift doesn't but Super Springs do! If you're interested, the SumoSprings Rebel Custom Helper Springs # SSF-173-40-2 for the front and # SSR-183-54-1 would work great. The front springs have a 3,000 lb capacity, the rears have a 7,000 lb capcaity at 50 percent compression, and will work in temperatures of -25°F to 200°F. If there is anything else I can do for you, please feel free to drop a comment and let me know!
    view full answer...
  • Front SumoSprings For 2018 Tiffin Allegro 32SA
    Everything I am seeing about a 2018 Tiffin Allegro 32SA is that it has a 24,000 lb chassis, so you'll want to verify what your chassis GVWR is before ordering. Here are the options for both the 22k and 24k front SumoSprings, with the right one depending on your chassis GVWR: - 22,000 lb Chassis: SumoSprings Rebel Custom Helper Springs - Front Axle # SSF-170-40-2 - 24,000 lb Chassis: SumoSprings Rebel Custom Helper Springs - Front Axle # SSF-173-40-2
    view full answer...
  • Recommended Sumo Springs For 2021 Ford F-53 Chassis Motorhome W/ 24000lb GVWR
    For your 2021 Ford F-53 Chassis motorhome with a 24000lb GVWR I recommend the Sumo Springs Rebel Custom Helper Springs # SSF-173-40-2 for the front which have a 3000lb load leveling capacity. For the rear you will need the Sumo Springs # SSR-183-54-1 as long as your motorhome is NOT a Fleetwood, Forest River, Newmar, or Thor model. If it is one of these models then you will need to go with the # SSR-187-54-1 instead. Both of these rear suspension enhancements offer 7000lbs of load leveling...
    view full answer...
  • Recommended Jounce Springs for Two-Wheel Drive 2019 Ford F-53 Chassis
    The jounce springs I recommend for your two wheel drive 2019 Ford F-53 chassis are from SumoSprings, the SumoSprings Rebel for the front axle and SumoSprings Maxim for the rear axle. The reason why the SumoSprings are the best is because they not only work to reduce sway, but also keep your vehicle level and give you a smoother ride. The SumoSprings can do this because they are made of a microcellular urethane which compresses. Each of the springs works independently which is what is going...
    view full answer...
    Image 1 for Image 2 for
  • Comparing the Air Lift LoadLifter Air Bags and the SumoSprings for a 2015 A.C.E. With a Ford F-53
    Adding the steering stabilizer and the front sway bar is definitely the first couple of steps that you want to take to help stabilize your motorhome. If you haven't already picked one out I recommend going with the Roadmaster # RM-1139-148 which is confirmed to fit a 2015 Ford F-53. Although air bags like the Air Lift LoadLifter 5000 Air Helper Springs # AL57240 would help to support the suspension and ultimately your ride, I recommend going with the SumoSprings as they require no maintenance....
    view full answer...
  • SumoSprings That Will Fit F-53 Chassis With 7.3L V8 Engine
    Let me see what I can figure out for you, I have the solution linked below: **SumoSprings Rebel Custom Helper Springs - 2 Piece - Front Axle # SSF-173-40-2. There was a generation change in the F-53 chassis, Ford changed the motor to the 7.3L V8. When they did this they decided they wanted to change the actual frame too. This is the issue for you. The part you have is designed for the last generation. You will need the SumoSprings linked above.
    view full answer...
  • Recommended Ride Enhancement for 2018 Thor ACE 27.2
    The Roadmaster Polyurethane Bushing Kit for 1-5/8" Diameter, Factory Front Anti-Sway Bar # RM-4139-127 will be the best first step in assisting in control since the rear already has assistance. The second step would be to add a Steering Stabilizer # RM-RBK22-RSSA. These will greatly increase the handling of your Motorhome. The Suspension Enhancement # SSF-170-40-2 would be the third step. You shouldn't need to replace factory shocks after just 10K miles, so I would do this order and...
    view full answer...
  • 2019 Thor Outlaw 37RB SumoSpring Recommendation for Improving Handling
    Your 2019 Thor Outlaw 37RB is built on a Ford F-53 chassis which is notorious for not handling great. The biggest improvement you'll be able make is with SumoSprings like the part # SSR-187-54-1 for the rear and part # SSF-173-40-2 for the front. These install pretty easily but I attached install videos for both for you to check out to really get an idea what the install will be like.
    view full answer...
  • Front & Rear SumoSprings For a 2013 Tiffin Allegro Open Road RV Motorhome On Ford F-53 Chassis
    I do see the models of the 2013 Tiffin Allegro Open Road were built on either a 22K or 24K Ford F-53 chassis. 22K GVWR Chassis Front # SSF-170-40-2 Rear # SSR-180-54-1 24K GVWR Chassis Front # SSF-173-40-2 Rear # SSR-183-54-1
    view full answer...
  • Recommended Suspension Upgrade for 2011 Newmar Canyon Star 3920
    I recommend adding front and rear SumoSprings to your RV. For the front kit you would need # SSF-173-40-2 and for the rear use # SSR-187-54-1. These will help to keep your RV from swaying in higher winds and when cornering.
    view full answer...
  • Correct SumoSprings for a 2018 Tiffin Open Road Allegro 32SA
    The correct SumoSprings Custom Help Springs for a 2018 Tiffin Open Road Allegro 32SA is part # SSR-183-54-1 for the rear and part # SSF-173-40-2 for the front.
    view full answer...
  • Shocks Vs. SumoSprings for a 2015 Tiffin Allegro Open Road 36LA
    If you are having porpoising issues with your 2015 Tiffin Allegro Open Road 36LA which is simply a front to back rocking feeling then I actually recommend you look into a pair of helper springs which are essentially a cushion that go between the frame and axle and work to limit up and down movement while also helping soften the ride as well. The helper springs I recommend are the SumoSprings Custom Helper Springs part # SSF-173-40-2 for the front and part # SSR-183-54-1 for the rear. I...
    view full answer...
  • What is Advantage to SumoSprings that are Two Piece Instead of One Piece
    The two piece design like the part # SSF-173-40-2 does allow the suspension to work better in the top of its travel since it can allow the sections to separate uninhibited. A one piece design would work to prevent the suspension from topping all the way out which could turn into a harsher ride quality. This would make bigger bumps on highway feel sharper since the suspension can move as much.
    view full answer...
  • Recommended SumoSprings that fit a 2019 Tiffin Allegro Open Raod Motorhome
    The bolt that is attached to the top of the SumoSprings Rebel Custom Helper Springs - 2 Piece # SSF-173-40-2 is a 3/8" x 3/4" flange bolt. This bolt is not offered as a separate part but you could easily go down to your local hardware store and pick up this bolt or if you buy the SumoSprings Rebel Custom Helper Springs - 2 Piece # SSF-173-40-2 which is a confirmed for your 2019 Tiffin Allegro Open Road Motorhome, it'll come with the kit. these springs have a maximum weight capacity of...
    view full answer...
  • Does The SumoSpring Kit SSR-187-54-1 Come With A Set Of Two?
    Hey Brendan, thanks for reaching out. Yes, both of the SumoSpring kits you mentioned, the # SSR-187-54-1 and # SSF-173-40-2 come in sets of two. All of the Sumo Spring kits come in sets of two - enough for one axle. What coach will you be using them on?
    view full answer...
  • Best Ways to Improve Ride Performance for 2011 Newmar Canyon Star 3920 Toy Hauler
    Thanks for reaching out, Blake! The best way to upgrade your 2011 Newmar Canyon Star 3920 Toy Hauler is to start off with anti-sway bars, then a steering stabilizer, and then add some suspension enhancement. Here are the parts I recommend for your application: - Front Anti-Sway Bar # RM-1139-148 - Rear Anti-Sway Bar # RM25VR (Might need square # RM-590050-00 or round # RM-590050-10 U-Bolts if factory U-Bolts can't accommodate 1/2 plate) - Steering Stabilizer (there currently aren't...
    view full answer...
  • Recommended SumoSpring Suspension Enhancement for 2019 Fleetwood Bounder 35K
    Your Fleetwood Bounder 35K features a GCWR of 26,000 pounds so for the rear axle the SumoSprings Maxim Custom Helper Springs # SSR-187-54-1 will work perfectly to upgrade the rear suspension and stabilize the Ford F-53 chassis during travel. These springs have a progressive load control to ensure a comfortable ride regardless of the weight of your cargo and they feature a weight capacity of 5,400 pounds. To further stabilize your RV I also recommend adding springs to the front axle with...
    view full answer...
    Image 1 for


< Previous
123. . .5
Next >



Do you have a question about this Vehicle Suspension?


Used Items Available
Image of SSF-173-40-2
Image of SSF-173-40-2

Condition: Installed

Notes: Item has been previoulsy installed and has cosmetic install marks.

$310.11
Add to Cart
Secure Checkout
Image of SSF-173-40-2
Image of SSF-173-40-2

Condition: Installed

Notes: Item has been previously test fitted and has minor cosmetic install marks.

$364.47
Add to Cart
Secure Checkout
Image of SSF-173-40-2
Image of SSF-173-40-2

Condition: Installed

Notes: Item has been previously test fitted and has minor cosmetic install marks.

$392.67
Add to Cart
Secure Checkout
Image of SSF-173-40-2

Condition: Surface Scratches

Notes: Item has minor cosmetic scratches and is missing the hardware.

$543.69
Add to Cart
Secure Checkout
Image of SSF-173-40-2
Image of SSF-173-40-2
Image of SSF-173-40-2
Image of SSF-173-40-2

Condition: Installed

Notes: Item has been installed/test fit.

$632.29
Add to Cart
Secure Checkout
Image of SSF-173-40-2
Image of SSF-173-40-2
Image of SSF-173-40-2
Image of SSF-173-40-2

Condition: Installed

Notes: Item has been installed/test fit.

$674.58
Add to Cart
Secure Checkout

Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Jonathan Y
Video Edited:
Jonathan Y
Employee Kathleen M
Video by:
Kathleen M
Employee Schuyler H
Video by:
Schuyler H
Employee Cole B
Installed by:
Cole B
Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Alex H
Updated by:
Alex H
Employee Michael B
Updated by:
Michael B
Employee Noah M
Updated by:
Noah M
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee Conner L
Test Fit:
Conner L
Employee David F
Test Fit:
David F
Employee John A
Test Fit:
John A

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.