For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear. Great Prices for the best vehicle suspension from Firestone. Firestone Coil-Rite Air Helper Springs - Rear Axle part number F4130 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Firestone Vehicle Suspension
- F4130
Highlights
Custom Fit for Your Vehicle: Mounts to existing attachment points
2,000-lb Load Support: Keeps your vehicle level and stable when hauling or towing heavy loads.
Better Steering and Braking: Prevents sag so handling, traction, and headlight aim stay consistent.
Adjustable 5–70 psi Air Pressure: Lets you fine-tune support side-to-side for off-center or uneven loads.
Smoother Ride Under Load: Cushions road shock to reduce bounce and bottoming out on rough roads.
No-Drill DIY Setup: Installs inside existing coil springs with all parts and hardware included.
Features to know about
Keep the Rear End Level and Stable: 500–2,000 lbs of Load-Leveling Support
Heavy loads can make the rear of your truck sag and throw off handling. Firestone Coil-Rite air helper springs add 500 to 2,000 lbs of load-leveling capacity to keep things level when hauling tools, gear, or a trailer. The air springs fit inside your existing rear coil springs to share the weight, improving braking, steering balance, and tire wear while keeping headlight aim steady.
Tune Ride Comfort for Every Trip: 5–70 psi Adjustable Air Pressure
Every haul is different, and these air springs let you dial in pressure from 5 psi up to 70 psi to match it. Add air when carrying something heavy to keep the suspension firm and stable, or let some out when running empty for a softer ride. Each side can be adjusted separately through individual manual inflation valves, so you can level off-center loads and reduce body roll on uneven roads.
Smooth Out Bumps and Prevent Bottoming Out: Elastic Polyurethane Construction
Rough roads or heavy trailers can cause harsh contact between the axle and frame. The Coil-Rite springs cushion that impact with flexible, elastic polyurethane that absorbs road shock for a smoother ride. That extra give helps prevent bottoming out under load and keeps the truck feeling controlled even on rough pavement or steep grades.
Set Up Once and Haul With Confidence: No-Drill Installation Kit Included
Getting these installed doesn’t require cutting or drilling into your truck’s frame. The custom-fit design mounts inside the existing spring seats using the included brackets, hardware, air line, and valves for manual inflation. Everything needed for setup is in the box, so you can install it cleanly with basic tools and get back to hauling without downtime.
Specs
Weight and Capacity
Load-leveling capacity: at least 500 lbs (at most 2,000 lbs)
Pressure
Adjustable air pressure: 5 psi - 70 psi
Warranty
Air springs: Limited lifetime
Hardware: 2-Year limited
Note
The construction material of the fittings may vary.
WARNING: This product and/or related accessories can expose you to chemicals including lead and/or lead components, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
Customers Who Purchased This Vehicle Suspension Also Bought...
Great Idea - but they won’t hold air, which makes them useless! I knew they would be difficult to install, so I had an experienced auto mechanic who has installed these before to help me. They went in nicely, there were no leaks at the fittings-but they just refuse to hold air. Very disappointing. 3615255
Mike L.
8/26/2026
Have you tried putting a dishwashing liquid/water combo on the area where the air line joins with the bag? This will make any leaks stand out like a sore thumb. It's extremely important that the air lines are cut precisely at a 90° angle. You can't use angle cutters, because it will crush the air line and it'll always leak....
Randall
9/4/2026
@MikeL
Yes we did the soap/water thing with no obvious leaks and we were very careful about how we cut the air line.
I got underneath the truck again and redid the soap/water spray without any obvious signs of a leak! I tightened all the fittings a little more and topped off the air — waited overnight and checked again —— still leaking, but maybe not as bad. In any case, to keep the minimum pressure I’ll have to ad air every morning before I can go anywhere! Not very convenient.
by:
Scott
05/28/2026
2026
Ram
1500
It fit great. And works like a champ... I couldn't be happier with these air helper springs! E trailer made it easy and they followed up with me to make sure i'm pleased with the product... Very happy with the service. 3553995
by:
David
03/25/2023
2019
Ram
1500
After installation we are towing on the level and enjoying the ride. In an effort to maintain the minimum air pressure to each Coil-Rite Helper at all times, we installed individual air supplies to each Helper. We used our onboard Horn-Blaster air compressor to supply two air pressure regulators allowing us to easily change air pressure to each individual helper as desired. Each regulator employs a check-valve to maintain pressure to the Helpers in case of a compressor failure. We have marked each pressure gauge to the minimum pressure and another mark for our desired towing pressure. 1543675
Working Good! Although the air fitting on the starboard Coil-Rite came loose last month. We tightened it down as instructed and then generously coated the fitting with gasket maker. I doubt that will back out again. These Firestone Coil-Rite Helper Springs greatly improved our towing experience. Our regulator system allowed us to easily adjust the pressure to the each time we unhitched, which allows the truck headlights to be properly adjusted.
by:
John
03/13/2021
Installed on my 2020 Ram 1500 4x4 ecodiesel. Took about 1 hour. Jacked up rear of vehicle to let coil spread out a little. Bags went in easy. Air lines were simple to run. Bought the union T-valve so I could air the bags up at same time and to make sure equal PSI goes to each bag. 983458
They still working great. Only minor issue is the line that threads onto bags do come lose and cause air leakage. Recommend locktite to solve the issue.
by:
Paul
06/22/2026
dodge
Ram Pickup
my air bags for my 23 ram were easy to install, the service was excellent. I will be telling every body I know about how friendly and easy it was to order from you. 3569710
by:
JOHN
12/21/2024
Dodge
Ram Pickup
Installation was harder than one would think, but it eliminated the squat my ram 1500 would do on even light trailers. It rides great and has been trouble free. 3244384
John
12/22/2025
I sold the truck, but it lasted and performed trouble free the whole time.
Gwendolyn Y.
12/22/2025
@John Glad they worked for you while you had the truck. Did you end up getting a new truck to replace the Ram?
by:
Rich
08/12/2026
Easy to install. Works great leveling the truck out when loaded 3606047
by:
Louis
12/09/2025
We travel full time towing our travel trailer. After 3 years with the other air bags they finally developed a leak. These are the replacements and are capable of holding higher psi. Don’t need the mx psi but nice to not come close to max of 50. Will install on a few weeks. 3459514
by:
Andrew
08/16/2025
Dodge
Ram Pickup
First I'll say these work great. 45 lbs in them on my Ram 1500 and I have a fully loaded bed, plus a 29 ft camper fully loaded with water, and my truck is level. Two reasons for not giving them 5 stars. The plate at the top of the airbags needs to be checked periodically if at lower levels or before inflation because of the "universal" fit. It can tilt weird. Second, the instructions seem simple enough but it still took 3.5 hours, in the shop, and even had to drop the axel to get them in easier. I'd love to see someone try to put these in while trying to do it in their driveway. 3391957
by:
Justin
08/04/2026
Looks perfect3600573
by:
Kenneth
08/01/2023
2016
Dodge
Ram Pickup
This is the best addition I've ever made to a tow vehicle! I have a 2020 Ram eco-diesel and I pull a 2016 Rockwood 25' travel trailer. Combined weight is about 11,000 lbs. These air bags help the truck handle much more confidently. My wife noticed a difference on our last trip (2200 miles round trip). The half ton Ram does a great job, the bags eliminate the little bit of squat. The level combination makes towing a breeze. The only hang up is installation. They do not squeeze between the spring coils. I installed mine at home but it wasn't easy. 1637045
Kenneth
8/2/2024
Wonderful! A valuable tool for safe towing.
by:
Robert
08/30/2021
Overall great product it has performed exactly as I needed. However it is not an easy install at all. I am a very experienced mechanic and I ended up taking it to a garage that had a lift. They had to drop the rear axle down to get air bags in springs. That cost me another $200. The mechanics exact comment was " you would have never got these in without a lift". I would buy again but I would not attempt without a lift. 1139074
by:
T.P.
01/29/2023
Install was not easy, would recommend just removing the coil spring vs struggling trying to shove the bag between coils. I struggled for about half a day before I was finally able to get both sides in. After installation, one side was leaking from the crimped connection between the air line and the brass fitting on the air bag side. This is not something that can be repaired. etrailer wouldn't help because of the time since my order (took me outside of their 60 day return period to install the bags) although reading their policies, they only allow returns of unissued items anyway so not sure if they would have helped anyway. Trying to work directly with Firestone to get a new air line so we'll see what happens. 1509887
by:
Noman
01/16/2023
2022
Ram
1500
Superior to previous brand of air bags installed on older Ram. Firestones are less expensive, retain pressure setting and are easier to install. 1500289
by:
Raymond Paul
02/10/2024
First and second set I tested before fitting them and they both leaked from the pvc pipes to the metal fittings. etrailer replaced the first set. When the second set leaked I cut the connection off and heated the pvc and joined it to the metal fitting, no leaks and works well. 1726709
by:
Paul
06/28/2023
Dodge
Ram Pickup
Really helped with the ride quality when towing.I installed these in my Ram in my driveway with the help of some jackstands. 1611050
by:
Byron
06/15/2023
Install was straight forward. However, The connectors are fragile and must be secured with great care. They are easily fractured and prone to leaks. Impossible to fix without wheel removal and spring removal. Once connected securely, it works well. 1601580
by:
Richard
09/30/2022
Works great towing my trailer. A little rougher ride without the trailer, but knew that at the start 1431535
by:
Brent
01/27/2025
Excellent transaction,quick shipping and a great price thank you !! 3255737
by:
Jonathan
03/01/2023
2021
Ram
1500
Exactly what I need, truck would settle with camper hitched up, now it doesn't. Simple easy fix 1527653
by:
Don
08/15/2022
Worked great, would recommend this product, etrailer was very helpful finding me the parts I needed 1358401
by:
Neil
09/30/2023
Easy to install and really helped to keep truck level. 1675602
by:
Scott
06/11/2024
They don't fit. I would like to return them 3156960
I will make sure our customer service team reaches out to you!
by:
Dale
09/15/2023
2020
Ram
1500
Overall almost great! When towing my 26' RV you can tell/feel the difference. One bag has a very small leak. I have taken the lines off twice and re-attached them. One bag never leaks. I would still recommend them. 1667738
by:
William
02/28/2024
Absolutely love these. Made towing my Rv a breeze. Highly recommend them. 1739628
Hello Mark,
Great question. Timbrens are a solid product, and I do like them a lot in the right situation. I typically only recommend them for vehicles that are under a constant load, like a work truck that always has equipment in the bed. When the truck is unloaded, Timbrens can sometimes cause a noticeably harsher ride since they are always engaged. I am not sure where you are located, but here in Missouri we might as well be driving on one giant pothole, so ride quality definitely matters.
A... view full answer...
Hi Gil!
Good catch. The Firestone Coil-Rite Air Helper Springs - Rear Axle # F4130 does indeed have 2,000 pounds of capacity, just like the Firestone Coil-Rite Air Bags w/ Easy Mount Compressor and In-Cab Control - Single Path - 2,000 lbs # F66XV. I am having our listing for it updated to reflect this as well.
They are the same bags and the # F66XV is in all in one kit that includes the bags and the compressor. The # F4130 is just the bags.
What kind of trailer will you be towing with... view full answer...
When selecting air bag helper springs I like to take into consideration not only the weight the truck can haul but also how often the truck carries heavy loads. As I see you have a 2019 Ram 1500 you have a few options. Do remember these will not increase payload or towing capabilities, they only improve vehicle stability and safety when carrying loads.
The Firestone Coil-Rite Air Helper Springs # F4130 are the lightest option. These have a capacity of 500-1,000lbs. I recommend these for... view full answer...
In order to help prevent sag while towing with a 2019 Ram 1500 (4x4 or 4x2) you have a few options, the SumoSprings Solo Custom Helper Springs part # SSR-307-47 or the Firestone Coil-Rite Air Helper Springs part # F4130. The Coil-Rite Springs are nice because you can adjust them for varying loads whereas the SumoSprings are non-adjustable. The SumoSprings however are maintenance free whereas the Coil-Rite Springs are not. That said, the adjustability of the Coil-Rite Springs exceeds the... view full answer...
As you mentioned, there are some pretty big differences between a jounce-style spring setup like the SumoSprings # SSR-307-47 and an air bag kit like the Firestone # F4130 for your 2020 Ram 1500, both in terms of install/maintenance and actual performance. The jounce springs definitely offer the easier install and require no maintenance thereafter, while the air bags are bit more intensive to setup and would need to be adjusted based on your truck's load.
If you are okay with this though... view full answer...
We sure do, you'll want to use the Firestone Union Tee for 1/4 inch air tubing, part # F3025-1. This fitting will allow you to inflate both of the air bags included with your # F4130 Coil-Rite kit to the same pressure at the same time using a single Schrader valve. view full answer...
A minimum of 5 psi must be in the air bags at all times, so the rating is measured before the load is on the truck for the Coil-Rite air bags that fit your 2019 Ram 1500, which are the following part:
- Firestone Coil-Rite Air Helper Springs # F4130
I have added a link below to a video review for you to check out as well if you'd like to take a look. view full answer...
You've got what's called a Carolina lift and there's nothing I can do for you that'll fix it. The Firestone Coil-Rite Air Helper Springs item # F4130 or any other suspension enhancement won't raise your stock ride height which is what you need. They're all designed to keep the suspension from sagging when under pressure from a heavy load in the bed or the tongue weight of a trailer pushing it down.
I recommend checking out Rough Country and see if they have some lifting blocks you can... view full answer...
Yes, the Firestone Coil-Rite Air Helper Springs - Rear Axle # F4130 you were looking at are confirmed to fit your 2021 Ram 1500 as long at it is not the Rebel model and the 1000lb load leveling capacity will do a great job of supporting your rear suspension when your 9000lb trailer with 800lb tongue weight is hitched.
To keep from having to manually inflate the air helper springs I recommend adding the Air Command Compressor System w/ Light Duty Compressor - Wireless - Smartphone Enabled... view full answer...
The valve core of the bag in part # F4130 gets removed once the bag is in the air spring and then once the bag is installed and in place you instead thread the fitting on the end of the air line into the bag instead of the valve core you removed. view full answer...
The Hayes Genesis # HA81790 with the adapter # HA81785-HBC is exactly what you need if your 2005 Toyota Tundra has the factory 7-Way. If your Tundra doesn't have a factory 7-Way then you'll need to use the pigtail # HA81789-HBC instead of the adapter, plus you'll need to install a 4-Way # C59236 and the Universal Installation Kit # ETBC7.
As far as the air bag suspension goes, the Firestone # F4130 are for new Ram pickups so for your Tundra you're going to need the Firestone Ride-Rite... view full answer...
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.
Mike L.
8/26/2026
Have you tried putting a dishwashing liquid/water combo on the area where the air line joins with the bag? This will make any leaks stand out like a sore thumb. It's extremely important that the air lines are cut precisely at a 90° angle. You can't use angle cutters, because it will crush the air line and it'll always leak....