To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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.
When you’re towing or hauling a heavy load, sag and sway can make things feel unsettled fast. The RoadActive Suspension kit adds up to 3,000 lbs of support by converting your factory leaf springs into a mechanically active suspension system. It keeps the rear end from squatting, levels your ride front to back, and helps maintain traction for steady braking and steering. Whether it’s a trailer on the hitch or gear in the bed, you stay level and in control instead of fighting the weight.

You don’t have to choose between comfort when empty and control when loaded. Each unit uses variable-rated coil tension springs that automatically adjust to the weight you’re carrying. Under load, they activate instantly to support the extra weight. When unloaded, they disengage so your leaf springs perform as intended without stiffening your ride. The result is a suspension that reacts right away when needed and stays comfortable when it’s not.

Heavy loads can twist your leaf springs enough to cause axle wrap or wheel hop, putting strain on your suspension and tires. This kit absorbs that force before it gets out of hand. By keeping the leaf springs stable, it eliminates axle wrap and wheel hop, prevents bottoming out, and cuts down on wear to shocks, shackles, and tires. It’s a simple way to make your truck feel tighter and smoother under real-world hauling conditions.

When cornering or running through crosswinds with a heavy trailer, body roll can make driving stressful. The RAS system reinforces your factory leaf springs to reduce sway and body roll before they start. It steadies the back end during turns, helps prevent trailer sway, and calms the rocking motion from passing trucks or gusty days on the highway. The result is a more composed ride that feels planted no matter the load or conditions.
This kit comes fully assembled and installs with basic tools—no drilling, welding, or cutting required. It bolts around your existing U-bolts and leaf spring eyes using corrosion-resistant brackets with an epoxy e-coated steel finish rated for over 800 hours of salt spray protection. Once installed, it’s maintenance-free with no adjustments needed down the road, giving you reliable performance every time you hook up or load up.




Ratings & Reviews

Michael
8/1/2025
I still think these springs are one of the best aftermarket purchases Ive made for this truck. Obviously, different trucks will give different results, but for me not having to hassle with a WDH I just use a sway bar makes all the difference. Before the springs, I would towwith a WDH and sway bar and constantly felt the trailer behind me or felt I was floating in the front end. These springs have *almost* completely eliminated that. Amazing difference.


Richard
5/1/2026
1-year comments - As mentioned, traded the F-150 for a Tundra. RAS did make a noticeable difference in handling of the travel trailer and body roll of the truck even when not towing. I can only guess but would recommend going with standard model over HD as ride was stiff with light load in the truck and not towing. Upgrading the suspension on the travel trailer made the most difference in overall stability. New slightly higher rated leaf springs, Morryde equalizer, and wet bolts, combined to greatly lessen the body roll of the trailer which led to a much more stable drive especially with side wind loads. RAS is nice and worked to give the F150 more strength for when towing or when more heavily loaded. So still give it 4 stars.


Brooke M.
5/13/2025
Really glad to hear that, James! The RAS is really good at its job for sure! Thanks for sharing the photo of your set up - the Airstream and truck are looking mighty fine! When's the next camping trip?

Heather A.
4/10/2025
Your install looks great! How is the RAS working for you?

Travice
4/18/2026
Best product i have spent mo ey on

Jeff
4/11/2026
The RAS is a great addition to the stock leaf springs on my F250. I have in the past year towed my 36’ Jayco travel trailer from Ontario to Nova Scotia and from Ontario to South Georgia. About 1700 miles total. From the 400 series highway the Trans Canada highway and the inter state highways the RAS along with the Fast Way E2 weight distribution and sway control system, my bumper tow is locked in and stable. The RAS reduces body roll on the tow vehicle eliminating the magnifying effect body roll has on the sway of the trailer. No white knuckling in cross winds or passing transport trucks on the interstate highways. Highly recommend to compliment the rear truck springs for towing heavy loads.

Kate F.
3/26/2026
Glad we had the part to get rid of the sag Allen! What kind of system do you have in the bed?

Brooke M.
6/24/2025
That's awesome, Art! Kudos to you for going ahead and tackling the job. Are you pretty comfortable with this type of work in general? The photos are great, too!

Jim
1/9/2025
Been a year now and I’ve pulled my 9200lb arctic fox trailer from Illinois to Halifax NS and back. The tongue weight was 870lb and the payload weight of the truck was maxed out from the Ford towing program and the CAT scale. The weight distribution hitch and this allowed for a very smooth ride even in the rain. The only issue was when the crosswinds were more than 10mph. The winds coming home out of Canada were 30mph and that was anxiety inducing especially coming across the mountains. Without the RAS I wouldn’t have even tried it. This was necessary to level the truck and have it track. I bought the trailer TPMS also because a blowout at that weight leaves no margin for error. Get the RAS for your light duty truck but don’t ignor your max weights. The rear axle weight was the limiting factor without the RAS and the WDH. The only drawback is the Ford headlight leveling sensor on the rear drivers side axle sits awfully close to the clearance of the shock and careful positioning is called for.

Victoria H.
3/12/2025
That's awesome Michael! I'm glad these made a noticeable different in your ride quality. Thank for including your valuable insight with your feedback along with the photos! I know this will be very helpful information to someone gearing up to install these in the future!

Paul
7/23/2025
It has worked out very well. Actually, better than I expected.


Michael
12/25/2021
Its been a year since I installed my Roadmasters. Would I do it again? Absolutely! They have made my travel trailer pulling such a better experience. In addition, my daily commute has been a pleasure as well.

Tracey T.
4/29/2022
After a year of use , these RoadMaster 3611-HD active suspensions are still the best addition to my trucks performance. The streets of Houston are brutal and these active suspension breeze through them. I have 354000 on this truck and if I ever get another, this Active Suspension will be the first addition. Hands down!

Brooke M.
6/26/2024
Wow, that is awesome to hear a product really deliver on what its made to do! Youre a competetive shooter? Thats so cool. I could never do that - Im such a bad shot I wouldnt hit water even if I fell out of a boat. Do you travel across the country or do you stay more local?

Keith
8/27/2023
Its been really wonderful. 10k 5er on my 07 2500hd classic ccsb and I can definitely notice an improvement in handling, including less porpoising. Towed it a couple times since, including a 7 hour drive. Very happy. I recently replaced the old wornout front bumpstops with sumo springs monsters and saw additional improvement. Neither hurts the unloaded ride, just better all around!

Dave H.
1/30/2022
It has been a year now since I installed the Roadmaster Active Suspension system on my 2018 F150. We pull a 30 ft travel trailer from Wisconsin to Alabama.Last year the roads became very slippery when we encountered a rain snow mix. The truck and trailer tracked perfectly. I just hooked up the rig yesterday to take the same trip, leaving tomorrow. The truck definitely handles better with the RAS. Im glad I installed it and am sure it will last for years.
Do you have a question about this Vehicle Suspension?
Info for this part was:
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.







Claire H.
9/15/2026
I'm glad to hear you're already feeling the difference with the RoadActive installed! What are you planning on towing/hauling that you wanted extra support for?