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When you hook up a heavy trailer or load down the bed, stock springs can flatten out and leave your rear end sagging. This kit adds up to 3,000 lbs of support by converting the factory leaf springs into a mechanically active suspension system. The variable-rated coil tension springs automatically adjust to weight changes, keeping the truck level and steady under load. You’ll see less squat, better braking traction, and a more balanced ride when towing or hauling.
Some suspension upgrades feel great with a load but harsh when unloaded. These coil tension springs automatically engage when weight is added and disengage when empty, so you get stability without stiffness. They react instantly to changing loads, which means no waiting for air pressure to build or hydraulics to catch up. The result is consistent control and comfort on every drive—loaded or not.
Heavy torque or sudden stops can twist leaf springs and cause wheel hop. This setup stabilizes the springs by absorbing that force before it turns into bounce or axle wrap. With the leaf pack held in its proper bowed position, traction improves under acceleration and braking, and you avoid the jarring motion that beats up suspension parts over time.
Cornering with a trailer or camper can make the back end lean hard. The reinforced design of this kit reduces sway and body roll so the truck feels planted through curves and crosswinds. It keeps your load centered and predictable during turns, lane changes, or when a semi blows by on the highway.
Each unit is made from epoxy e-coated alloy steel with corrosion-resistant brackets rated for more than 800 hours of salt spray. Once bolted in place—no drilling, cutting, or welding required—the system needs no upkeep or adjustments. You set it once during installation using the included spacers for tension tuning, and it’s ready to handle years of towing and hauling without extra maintenance.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
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.
Claire H.
5/1/2026
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?
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.
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?
Steve
9/12/2025
Great, these springs gave my truck stability and the ideal ride height I needed to pull my trailer with minimum sway. I would definitely purchase these again.
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.
Lee
10/29/2025
After having the RAS for awhile now.. It is a great upgrade to the F150 towing system…Well worth it
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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.