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  1. Vehicle Suspension
  2. Ram
  3. ProMaster 2500
  4. 2021
  5. SuperSprings Intl
FITS 2021 Ram ProMaster 2500
SumoSprings Solo Custom Helper Springs - Rear Axle
SuperSprings Intl

SumoSprings Solo Custom Helper Springs - Rear Axle

Part Number: SSR-313-47
In Stock
$310.99
Retail:$361.81
You Save: $50.82
Vehicle Suspension
Confirmed to Fit
2021 Ram ProMaster 2500

2 Wheel Drive Models

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Call etrailer.com at 1-800-940-8924 for expert service. We are your Ram vehicle suspension experts, and offer a great price. etrailer.com carries a complete line of SuperSprings Intl products for your Ram ProMaster 2500 2021. SumoSprings Solo Custom Helper Springs - Rear Axle part SSR-313-47 from SuperSprings Intl can be ordered online at etrailer.com. Complete vehicle suspension installation instructions and technical support.
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2021 Ram ProMaster 2500 - SumoSprings Solo Custom Helper Springs - Rear Axle

  • Bump Stops
  • Towing/Load Leveling
  • SuperSprings Intl
  • Light Duty
  • Rear Axle Suspension Enhancement

1,500-lb Capacity. Upgrade your Ram ProMaster 2500's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.


Features:

  • Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
    • Keep your vehicle level when you're towing or hauling a heavy load
    • Help to absorb bumps and shocks
    • Minimize sway
  • Progressive load control - springs compress according to the weight of your cargo
    • Lighter loads - springs compress easily at first for soft engagement and a less bumpy ride
    • Heavier loads - springs compress by as much as 80 percent for support
  • Springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns
  • Durable microcellular urethane
    • Works in temperatures from -25 F to 200 F
    • Resists damage caused by oils, road salts, and UV rays
  • Minimal lateral expansion - springs compress vertically instead of to the sides so they aren't easily damaged when operating in tight spaces
  • Maintenance-free - no tubing to run or air pressure to monitor like with air springs
  • Simple, no-drill installation
  • 2 Jounce-style springs included
  • Made in the USA


Specs:

  • Weight capacity (at 50-percent compression): 1,500 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee


Rear Suspension Support

Towing or hauling a heavy load can cause rear sag as your factory suspension compresses under the weight of the load. This means that the rear axle is trying to support not only the extra load but also the weight of your vehicle. And because there is less weight on your front axle, your front tires make less contact with the road, which causes problems with traction, steering, and braking. SumoSprings upgrade your vehicle's factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.


Installed spring when it is not compressed

SumoSprings provide progressive load control - the more you load them, the stiffer they become. With a lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The closed-cell urethane material allows for smooth contact between the springs and your vehicle. And the springs act like a shock absorber to dampen road vibration.


Installed spring when it is compressed

The springs can also compress by as much as 80 percent to support a heavy rear load and to help your factory suspension bear up under the load. This evens out the weight, which levels your vehicle and ensures that your front tires are making better contact with the road. A level ride means that you have improved driving control, ensures safe headlight aim, and helps to minimize sway. The springs also support your factory suspension, which helps prevent sagging and reduces bottoming out.


The springs work independently from one another to support each side of your vehicle. This action helps to reduce body roll when you make a sharp turn. This also helps compensate for an off-center load.


Durable, Custom-Fit Springs

These microcellular urethane springs are tough. They resist abrasion, oil, salt, and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from -25 F to 200 F (-33 C to 93 C).


SumoSprings compress vertically with minimum expansion to the sides, so they won't be damaged by nearby mechanical parts and they fit safely into tighter spots. And unlike air springs, SumoSprings require no maintenance or adjustment.


The helper springs are custom designed to fit your vehicle, and they install easily - no drilling required.



SSR-313-47 SuperSprings Sumo Springs Solo Rear Ram ProMaster 2500 Suspension Kit for Vans

Replaces SSR-308-40

Installation Details SSR-313-47 Installation instructions

Ratings & Reviews

4.7

2051 reviews
5 Stars
(1657)
4 Stars
(277)
3 Stars
(43)
2 Stars
(25)
1 Star
(49)
1,500-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.

by:

I was surprised at how much of a difference these actually make. I bought them based on some videos of others using them, but wasn't sure if they would actually make much difference in my situation. I tow a 6800lb trailer with a Silverado 1500. With the tongue weight of that trailer, the rear of the truck doesn't drop all that much and I wasn't sure if replacing the bump stops was even necessary, but when I'm on roads with "heaves" and especially bridges where porpoising can be a problem, these SumoSpring certainly help. You probably won't notice some huge drastic change, but it's just enough to matter and even out the ride to a noticeable degree. Also, they're pretty easy to install (and I'm only barely handy when it comes to this stuff.)



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See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Reducing Stiffness of SumoSprings Solo Custom Helper Springs # SSR-313-54 on 2022 Coachmen Nova 20C
    First you will want to check your 2,800lb SumoSprings Solo Custom Helper Springs # SSR-313-54 to determine if 2nd 1" spacer was installed with the springs. If you have both the 1" spacers you will want to remove the 1" spacer which doesn't have the pressed in nut. This will help to reduce how much the spring compresses under a normal load. As the spring is progressive it will reduce how stiff the spring is and help to smooth your ride. If you are still finding the ride is to harsh you...
    view full answer...
  • Suspension Enhancement For a Smoother Ride On a 2022 Coachmen Nova 20C Class B Motorhome
    There are a few different SumoSprings for the rear of your 2022 Coachmen Nova 20C. If you have the lightest 1,000LB # SSR-313-40 springs on your Nova these are not going to provide enough support for all the additional weight added to you camper. A better option would be the 1,500LB # SSR-313-47 or 2,800LB # SSR-313-54 depending on how much cargo you are carrying or towing. Please let me know what you have and the types of loads you are carrying and I can help you determine if there is...
    view full answer...
  • Recommended Sumo Springs for 2019 Ram ProMaster 2500 Converted to RV/Office
    Sumo Springs are a great solution that are easy to install and don't require any type of maintenance once they're on. I recommend using the SumoSprings Solo Custom Helper Springs # SSR-313-47 because of the springs compress easily at first for soft engagement and a less bumpy ride. These springs are useful for up to 1500-lbs of additional weight in our ProMaster, so they're a good fit for your RV/Office. You could go up to the # SSR-313-54 which are designed to offer 2800-lbs of load...
    view full answer...
  • Recommended SumoSpring Kit for Itasca Viva Motorhome Built on Ram Promaster 3500 Chassis
    All three SumoSprings kits fit your 2018 Ram Promaster 3500. The difference is the capacity of each. The # SSR-313-54 is the highest rated at 2,800 lbs, the part # SSR-313-47 is 1,500 lbs, and the # SSR-313-40 is 1,000 lbs. Due to the weight of your motorhome I'd recommend the highest capacity kit # SSR-313-54 which will make the biggest difference.
    view full answer...
  • Recommended Sway Bar and SumoSprings for a 2024 Winnebago Travato
    Congrats on the new RV! Your 2024 Winnebago Travato was built on a Ram Promaster 3500 chassis so the correct awesome sway bar for it will be the Roadmaster item # RM52GR. This rear anti-sway bar is 1-1/4". We do not have a front one and Roadmaster doesn't list one either. As far as SumoSprings go we only have ones for the rear as well. I recommend the SumoSprings Solo Custom Helper Springs item # SSR-313-47. These have a 1,500 lbs capacity and will do a great job of supporting your rear...
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  • Will the SuperSprings Custom Suspension Stabilizer Help Bottoming Out On 2016 Pleasure Way Lexor TS
    The SuperSprings Custom Suspension Stabilizer and Sway Control Kit part # SSA11 is an excellent option for a 2016 Pleasure Way Lexor TS on a Ram ProMaster 3500 Chassis. It will do a great job of helping to prevent rear end sag thereby increasing ground clearance. Unlike the SumoSprings Solo Custom Helper Springs part # SSR-313-47, they will engage right away so this should then do a much better job of making sure you have as much ground clearance as possible. In regards to comparing the...
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  • How To Prevent Side to Side Sway When Trucks Pass On a 2019 Winnebago Travato 59K
    I do have an option for you but a steering stabilizer would not really be much help for the side to side rocking while being passed by larger vehicles. The most beneficial option we have to help reduce this would be to add/upgrade the rear sway bar, the Roadmaster Rear Anti-Sway Bar part # RM-1129-143. Generally speaking, an upgraded rear anti-sway bar is one of the most beneficial upgrades you can make to a motorhome as this is typically the area most are lacking from the factory. If...
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  • Best Way to Reduce Sway and Improve Ride of 2015 Winnebago Trend Motorhome
    Improving the ride quality of your 2015 Winnebago Trend motorhome is something we can help you with, though I should note that there is no way to upgrade the towing capacity, which is set by the manufacturer. I recommend adhering to the capacity to ensure you do not put undue stress on your Winnebago's chassis, transmission and suspension components. The best way to enhance the ride of your '15 Trend is with the Roadmaster Rear Anti-Sway Bar # RM-1129-143 because it is a vast improvement...
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  • What SumoSprings Kit to Use on a 2023 Winnebago Solis Motorhome
    Hey Lenny, thanks for reaching out! We have 2 different colors of the SumoSprings Solo Custom Helper Springs that fit your 2023 Winnebago Solis Motorhome, and the colors are based off of the weight ratings assigned by SumoSprings rather than trying to match the color with what comes factory on your vehicle. Here are the different weight ratings: - Blue # SSR-313-40 (1,000 lbs) - Black # SSR-313-47 (1,500 lbs) - Yellow # SSR-313-54 (2,800 lbs) The black would be great for standard...
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Info for this part was:

Employee Leah B
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Leah B
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