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Firestone Coil-Rite Air Helper Springs - Rear Axle

Firestone Coil-Rite Air Helper Springs - Rear Axle

Item # F29ZR
Our Price: $179.56
You Save: $56.43
Vehicle Suspension

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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 F29ZR can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (605)
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Firestone Vehicle Suspension - F29ZR

  • Air Springs
  • Rear Axle Suspension Enhancement
  • Light Duty
  • Firestone

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.


  • Provide extra support for your existing rear coil springs
    • Fit inside existing coil spring suspension on your vehicle
  • Keep your vehicle level when you are hauling a heavy load
    • Improve steering control and balance
    • Level your headlight beams
    • Reduce tire wear
  • Maintain even load distribution with air pressure, leveling off-center loads
    • Air bags adjust manually, side to side, with individual inflation valves
  • Enable more effective braking and handling
    • Work under heavy loading and adverse road conditions
  • Increase stability to promote a smoother ride and prevent bottoming out
  • Made of durable, elastic polyurethane for years of comfort and stability
  • Include all materials necessary for installation
    • Brackets, air springs, hardware, air line and separate valves for manual inflation
    • Switches and gauges, compressors, and air tanks (sold separately) are available for quick and easy air spring inflation/deflation from inside your vehicle
  • Made in the USA


  • Load-leveling capacity: at least 500 lbs (at most 1,000 lbs)
    • Coil-Rite springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • Adjustable air pressure: 5 psi to 70 psi
  • Limited lifetime warranty on air springs
  • 2-Year limited warranty on hardware

Note: The construction material of the fittings may vary.

Firestone Coil-Rite Air Spring Basics

Firestone Coil-Rite springs fit inside your existing rear coil springs to maximize the effectiveness of your suspension system. The added cushion provided by the air springs allows your vehicle to better handle a heavy load or trailer. Hauling heavy loads or towing a heavy trailer can make the rear of your vehicle sag and the front end rise. This puts more strain on your rear axle and reduces contact between your front tires and the road, causing problems with braking, steering control and traction. By adding air springs to your rear suspension, you can help to level your vehicle for more effective braking and handling under heavy loading or when you encounter adverse road conditions. The air springs also help to level your headlight beams and reduce wear on your tires.

Adjustable Air Pressure

Firestone Coil-Rite airline installation

The air pressure in your Coil-Rite springs can be adjusted manually, side to side, to compensate for off-center loads. A centered load improves the stability of your vehicle by reducing body roll. The air springs will also help to absorb road shock and soften contact between your axle and frame. This prevents bottoming out, thus improving ride comfort. Route the air line tubing for the springs to your vehicle's bumper to provide easy access to the manual inflation valves.

Air Spring Construction

Firestone Coil-Rite air spring components

Coil-Rite springs are constructed of durable, elastic polyurethane to ensure years of service. Single replacement springs (sold separately) are available for maintenance to an existing Coil-Rite kit.

Air Spring Installation

The Coil-Rite springs install inside your existing coil springs. The custom-fit springs attach to your vehicle's spring seats.

W237604148 Firestone Coil Rite Air Bags - Suspension Kit - Rear Axle


This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Firestone Coil-Rite Air Helper Springs - Rear Axle - F29ZR

Average Customer Rating:  4.4 out of 5 stars   (605 Customer Reviews)

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 upgrade for carrying weight in the back or towing a trailer. They are a bit tough to install. I found twisting the bag over in the middle and inserting it between the spring to the trick. Insert the top side on the passenger bag first. Insert the bottom side first on the driver side take care with the week ass tubing because if it folds over on itself in a coil, it will remain pinched which I can see will cause problems in the future. The tubing was better 20 years ago than what they give you today. One tube replacement over $30!! Ridiculous !! I like the right height adjustability and my truck feels more stable with a load of weight in the back of my truck advertised in the video shown below.


Great product and works perfect on my Jeep Gladiator. The instaletion video was nice to watch although is very much the harder way to install the air bags. Much easier to remove the outer sway bar bolts and the shoch bolts, raise the frame and drop the bag down through the top of the removed spring. Just be sure to align the factory top spring pad correctly when raising the axle back in place. This also made it a lot easier to install the air line. It took me about one hour this way for the complete job and never folded the bag to force it through the spring.



I have been towing my trailer to some fun locations on some not so friendly roads. The air bags are working perfectly. I bring an air compressor with me so I can deflate to low pressure when not towing and fill the airbags up when needed.


Super easy one person install on 2020 Jeep Gladiator. tip: drop the shocks at the lower mounting point and drop the sway bar links where they attach to the frame, springs slide right out making this MUCH easier. Great service and fast shipping keep us coming back to etrailer again and again, All it takes is 30-40 lbs of air via a single valve stem thanks to purchasing the T fitting. We are ready to crawl! Trailer pictured is 4000lbs + loaded. Sitting very well thanks to this Firestone bag kit! Thanks again etrailer!

2020 Jeep Gladiator

They want a review 12 hours after delivery :-(
On a 40 degree day I had to drop the shocks and swapbar connections and then jack down the axle housing and remove the springs and drop the bags in from the top. The bags are just to solid, even after warming them up inside the house, to go thru the side of the spring. It doesn't take all that much longer to remove the springs. You just have to be aware of more ways that hoses, cables, and such could be hurt.
The ride is stiffer, even at 5# of air. Measuring rearend sag they should be able to deal with the load my trailer tongue when aired up to 60#
I would have waited and done a better review but they couldn't wait to bug me for comments

2022 Jeep Gladiator

I think its sad when i cant get help with a part that you guys forgot to send but then now its a warranty thing now wow.

2021 Jeep Gladiator

Bought these in February 23, a hole appeared in one on July. Had to buy second set to replace one bag. Ordered on a Saturday, paid for 2 day delivery and received on Wednesday. Figured I would have received them on Tuesday

2021 Jeep Gladiator

Much improvement for towing and hauling heavy loads in the bed. 2021 Jeep Gladiator and NuCamp T@B 400 Boondock teardrop trailer.

2021 Jeep Gladiator

Fantastic product! Raised my Gladiator almost 2" in the rear. Purchased these bags because of the drawer system, bed rack, and RTT in the bed caused the rear of the Gladdy to be 1.25" lower than the front. Now the Gladdy sits like a "normal" truck with the rear slightly higher than the front. Ride is noticeably better! Painful to install but worth it!


The installation wasn’t bad but I already have an issue with one bag. I will let you know when I get time to take it apart and find the air problem.


Installed in jeep . Nice added feature for pulling camp trailer .
They work great . Should of done sooner.


Great quality product. These will help sag when towing a trailer. They will also increase the ride harshness slightly.


Doesn’t quite lift up as I expected it to but does make the springs stiffer


Make sure to watch an install video, makes things much easier. Significantly improves droop and towing. Exceeded my expectations.


Great quality product, although for install I had to pull the springs on my diesel gladiator to get the airbags installed.


The kit was exactly as described. But the bags were very hard to slide in it was way easier to remove than sping and slide the bag in from the top


Item arrived promptly . No installation yet


Tough to install through coil spring but happy once installed


While these were more difficult to install than they looked, They did the job. I'll be towing with them in just a few days!


Great product thank you for everything




2022 Jeep Gladiator


2020 Jeep Gladiator

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See what our Experts say about this Firestone Vehicle Suspension

  • Compatibility of Firestone F29ZR Coil Rite Air Helper Springs on Lifted Vehicle
    You could indeed use the # F29ZR if you have a body lift as the suspension geometry and height wouldn't have changed. If you have a suspension lift, in order to recommend the correct solution, I'd need to know the inside diameter of the coil springs and the inside height measured from stop to stop. If you can reply with that information, I'd be happy look for a solution. I've linked to an installation video for the # F29ZR Coil Rite System.
    view full answer...
  • Correct Air Bags for a 2021 Jeep Gladiator
    The Firestone Coil-Rite Air Helper Springs part # F29ZR are a fit for a 2021 Jeep Gladiator. They install inside the airbags and then expand when pressure is added. Therefore, the dimensions change when pressure is added so I'm not sure measuring would be helpful. If you have stock coil springs they are a confirmed fit. That said, the spring is roughly 11" tall x 5" diameter.
    view full answer...
  • Air Bag Suspension Kit that Fits 2024 Jeep Gladiator
    Yes we have the Firestone Coil Rite kit part # F29ZR that fits your 2023 Jeep Gladiator. This will give you additional rear suspension support that would prevent suspension sag when towing or have a heavier hitch accessory.
    view full answer...
  • Could Firestone Coil-Rite Air Helper Springs Fit 2022 Jeep Gladiator with 2 inch Lift
    As long as the lift that was installed on your 2022 Jeep Gladiator didn't change the coil spring dimensions of the vehicle the Firestone Air Bag Kit part # F29ZR would fit without any issues.
    view full answer...
  • Does Valve Core/Cap Permanently Remove off of Firestone Air Bag from Kit F29ZR
    You would leave the cap off of the air bag of the part # F29ZR once the bag is in place. This allows the fitting on the end of the air line to control how much air is in the bags.
    view full answer...
  • What is Install Time for Firestone Coil-Rite Air Helper Springs # F29ZR
    I'd probably set aside a couple hours to install the Firestone Coil-Rite Air Helper Springs # F29ZR as it's a pretty simple install overall. I attached an install video for this for you to check out as well.
    view full answer...
  • Will The Firestone Coil-Rite Air Helper Springs Fit a 2021 Jeep Gladiator With 3-1/2 Inch Lift?
    The Firestone Coil-Rite Air Helper Springs # F29ZR can be used on your 2021 Jeep Gladiator as long as you are still using the factory springs with your 3-1/2" lift. If your lift replaced the factory springs I will need you to take a few measurements to confirm if the helper springs will still fit. I need to know the inside diameter of the coils, height inside the coils and the distance between each coil. The Air Command Compressor System # F2610 will allow you to control the air pressure...
    view full answer...
  • Do Firestone Coil-Rite Air Helper Springs # F29ZR Fit A 2021 Jeep Gladiator Mojave?
    As long as your 2021 Jeep Gladiator Mojave still has the OEM coil springs the Firestone Coil-Rite Air Helper Springs - Rear Axle # F29ZR you were looking at will fit perfectly. The # F29ZR offer a 500-1000lb load leveling capacity to support your rear suspension when you are towing or have a heavy payload in the bed. To keep from having to manually inflate the helper springs I recommend adding the Firestone Air Command I - Analog Gauge w/ Light-Duty Compressor - Single Function - 130...
    view full answer...
  • Firestone Coil-Rite Air Helper Springs on a Lifted 2021 Jeep Gladiator
    I checked with the manufacturers rep about use on your 3.5" lifted 2021 Jeep Gladiator. If your lift was completed without changing the dimensions of the OEM coil spring components then the Firestone Coil-Rite Rear Air Helper Springs, # F29ZR will fit. If your 3.5" lift project entailed change of these components then the Firestone Coil-Rite Rear Air Helper Springs, # F29ZR will not work. Per Firestones literature "Lift spacers can be used with most Ride-Rite™ air spring kits, but not...
    view full answer...
  • Which Air Bags For Coil Springs on 2020 Jeep Wrangler Unlimited JLU
    I have a solution for you, but the Firestone # F29ZR are not a fit on the 2020 Jeep JLU. Instead, I recommend using the Air Lift 1000 Air Helper Springs for Coil Springs - Rear # AL60829, which are a similar style air bag for your coil springs that will do a great job at helping stiffen up the back end when towing. I've linked a short review video of these for you to have a look at, as well.
    view full answer...
  • Suspension Enhancement Recommendation for 2021 Jeep Gladiator Towing Trailer
    I would go with the SumoSprings kit part # SS42XR for your 2021 Jeep Gladiator Mojave for suspension support. Air bags can work great but they are a lot more maintenance and the support they provide is very easily pretty harsh. The SumoSprings kit is something that once you install it you don't have to think about it again and it will provide the support you are looking for for all of your trailers.
    view full answer...
  • What Rear Suspension Enhancement Fits The 2" MOPAR Lift Springs For 2020 Jeep Gladiator Rubicon?
    It appears you are going to need to consider the SumoSprings # CSS-1195R for your 2020 Jeep Gladiator Rubicon. When I reached out to Firestone to verify if their Coil-Rite Air Helper Springs # F29ZR would work with the lift coils you have they said they would not fit properly. To verify the SumoSprings # CSS-1195R I will need for you to measure the diameter of the spring coils and the height between the coils at unloaded ride height.
    view full answer...
  • Firestone Air Bag Kit for a 2020 Jeep Gladiator
    There is an air bag kit for your 2020 Jeep Gladiator from Firestone with their Coil-Rite kit # F29ZR. This kit fits both the 2WD and 4WD versions of your vehicle and it installs inside the coil springs so it's a little different than your standard air bag kit but it's still effective. I've attached an installation video as well as a photo of this kit on a 2020 Gladiator for you to reference. I like to recommend an air compressor with any air bag kit because it allows you to monitor and...
    view full answer...
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  • Is There A Weight Distribution Hitch Compatible w/McHitch On Obi Dweller 13 Pulled By 2022 Gladiator
    With the McHitch on your Obi Dweller 13 I have a couple recommendations since you will not be able to use a traditional weight distribution hitch. The McHitch changes the pivot point from the ball to the u-joint so it will not work properly with any current weight distribution hitch. Instead you can mount Firestone Coil-Rite Air Helper Springs # F29ZR on your 2022 Jeep Gladiator. This will allow you to take much of the rear end sag out of your rear suspension. You can use the Air Command...
    view full answer...
  • Are There Rear Suspension Air Bags for a 2021 Jeep Gladiator
    I do have options for you but the air bags for a 2021 Jeep Gladiator are all designed for the factory coil springs so we can't confirm fit if you have swapped these out for aftermarket. The only options we can confirm fit of with aftermarket coil springs is the jounce replacement style like the Timbren Rear Suspension Enhancement System part # T76FR which will also require the Timbren Spacer For Raised Frame Vehicles part # A25723-90AH00.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video by:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
Alex H
Employee Ryan G
Test Fit:
Ryan G

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