To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
When towing a trailer or hauling a heavy load, sagging springs can throw off braking, steering, and headlight aim. The RoadActive Suspension heavy-duty kit adds up to 3,000 lbs of load support by converting your factory leaf springs into a mechanically active system. Variable-rated coil tension springs automatically adjust to your load, leveling your ride and maintaining traction so the truck feels stable and predictable no matter what’s in the back.
Heavy loads can cause sway, body roll, or wheel hop that make towing feel sketchy. This system eliminates those problems before they start. The variable-rated coil tension springs engage instantly when weight is added, absorbing force before the leafs twist or flatten. That means no more axle wrap or wheel hop under throttle and less side-to-side sway when cornering or driving in crosswinds. The result is a setup that feels planted and controlled on highways, backroads, and job sites alike.
Most suspension upgrades trade comfort for stiffness when unloaded—but not this one. The RAS system disengages its coil tension springs when your bed is empty so the leaf springs move freely and ride quality stays close to stock. Load it up again and the coils re-engage automatically to support the extra weight. It’s a seamless transition that keeps daily driving comfortable while still giving full support when needed.
A suspension upgrade is only as good as its durability. Each RAS unit is built from high-grade alloy steel with epoxy e-coated coil springs for corrosion resistance. The brackets have a salt spray rating of more than 800 hours, so they stand up to moisture, salt, and rough conditions. Once installed with the included hardware, the system is maintenance-free—no air lines to check or adjustments to monitor—just reliable performance every time you hook up a trailer or load the bed.
Installing serious suspension support doesn’t need special tools or fabrication work. This kit comes fully assembled and bolts directly onto your factory leaf springs using included hardware—no drilling, cutting, or welding required. It’s a straightforward install that locks in solid performance and long-term stability in just a few hours of hands-on work.
RoadActive Suspension will not increase your vehicle's weight-carrying capacity.
Ratings & Reviews
My tundra handles better and these were a easy install. Under 3 hours.
Haven't trailered with these installed yet but they installed easy and gives a nice ride. Will update once we start trailering.
2020 Tundra install that is supplementing a full Icon suspension including upgraded leaf springs. Easy installation process and completed by myself in a short afternoon. Definitely can tell a positive difference in handling even with no load. Pulling the trailer tomorrow to see the real benefits!
Worked well on leveling 1,000 lb tongue weight
I am a competitive shooter and take my camper to all my shoots. I have a cap on my truck and the decked drawer system. I also carry 400 lbs of ammo at any given time. When pulling my camper on the highway or over bumps and railroad tracks it was kinda scary. This system stopped the squat and removed the sag at acceleration. I installed sumo springs as well (without spacer) for added sway control when loaded down with trailer. The RAS was great right from the start. It reminded me of the 80’s then we would put traction bars on old hot rods to stop rear squat on acceleration. Same kind of feel with my truck. Some much nicer. With the trailer it removed 1.5 inches of squat on the rear and got my front and back within 1” of variance and before install it was around 2.5 to 3. Took only fifteen minutes per side to install once the tires were off. Great product….
Total transformation! I never knew how bad my ride was until I installed these RoadMaster 3611-HD active suspension. It took longer to safely jack my truck up and remove tires than it was to install them! Absolutely a game changer. I carry about 1000 lbs of tools and supplies daily and like riding a Rollercoaster when hitting bumps. Now, i hit bumps on purpose just to feel these RoadMasters work their magic! Love them!
Installed on my 2016 F-150 XLT. Truck Only Report: I'm very pleased with my unloaded truck ride. My truck now takes bumps much better and feels like it hugs the road better. On my wife's first ride, she said, "It feels like it rides smoother." I agree.
Although I have not towed my travel trailer yet, we will next week, when I hooked it up to my truck, all of my measurements are much better. With my WD hitch connected, all of my truck measurements are very close to equal to the unloaded, pre-RAS, measurements. In other words, with the trailer attached, much truck sits almost exactly at factory unloaded level. I'm really looking forward to giving a good run next week.
The Road Active Suspension is The solution .
2015 F150 EB Max Tow pulling a Lance 1685..
Truck pulls TT with no effort..but was looking for better handling options.
Have many miles without RAS vs Quite a few now with RAS.
The driving and handling is a very welcome improvement… from high mountain passes and roadways to Interstates.. wind… rain … etc
Was contemplating a 3/4 ton… not now.
Easy install.. you won’t be disappointed
Easy Install and everything was in the box. These raised the rear of my truck 1 1/4” and give a stable ride.
Very easy to install and made a big difference. I have 300lbs in the back a d it made it sag. With this on, look like stock height.
Received this yesterday and the directions are very vague for my Dodge pick up, but upon looking at things, it does not work for my truck because it has overload springs. I think all.2001 2500 Rams have the overload springs?
That was never mentioned in the guaranteed to fit my truck, but, This kit cannot be installed if your truck has factory overload springs sitting on top of the main leaf spring pack.
So I guess I will never know how good they actually work.
My husband had some trouble woth the first one with the spring but they are amazing truck didnt move an inch when we put our 5th wheel on it amazing.
Install went smooth, did this myself. Gave my F150 the extra support to be able to tow my half ton rated fifth wheel with the truck sitting level. The unloaded ride is still just like it was prior to install. I used the thin white spacer to set the spring tension.
I have heard nothing but good things about these enhancement springs so I bought a set. Very easy to install if you have any mechanical ability at all. Haven't used my truck to pull out 5th wheel RV yet but I will in a couple of days. I have a 2500HD it seems to have soften the ride a little. It doesn't make sense but prior to instillation it rode rough like it should, but the springs seem to help. IDK
Finally decided to try the RAS system for the truck since I bought a bigger camper. Ordered it hoping it would get here in time for an install before our new camping trip. Arrived in plenty of time! Opened it up and went through the instructions and got to the install. So, advice…read instructions from start to finish before starting! LOL. I thought they sent the wrong parts and then I read the instructions completely and then said, oh yea, forgot that part. Ha ha. Anyway, there's always a better way to do things based on your situation and vehicle. So after a few different attempts, finally got my groove and install went just fine. As always…take your time, double check everything before tightening down! Anyway, completed the install and then took it for a quick drive. Real happy with it! Felt substantially like it can handle more weight. Will be trying it with the camper next week. Again, thanks to the etrailer peeps for getting it to me on time. Since Murphy's Law resides in my garage, I wanted plenty of time to do the install right…and they delivered! Literally. Thanks again and will look forward to the next order.
Installed this today on my 2023 Ford F150 Lariat 4x4 with the tow package. The kit arrived within 2 days of ordering. The box was slightly open but the springs appeared undamaged. I elected to do the install myself and opted to get a 4 ton floor jack to replace my very old 3 ton. I’m very glad I did. After blocking the front tires and setting the parking brake, I loosened the wheels and raised the rear at the differential using a small 2x4 block to span the contact points. I took the wheels off and originally set my jack stands in front of the leaf spring on the frame. Lowering the truck onto the stands was not effective. There wasn’t enough travel to provide relief to the springs. I ended up setting my jack stands on some 1x16 scrap pieces and put them under the spring attachment point. This gave me just enough room on my floor jack to unburden the springs. Once I got over this small hurdle the install went smoothly. This took about an hour to very carefully construct as I didn’t want to drop my brand new truck on the ground. Brand new 5 ton jack stands would have eased my mind considerably. My install includes a spacer for the bump stop to offset it towards the centerline of the vehicle. The instructions weren’t intuitive and it took a few minutes to figure out the bolts. You need to insert the provided bolt into the spacer and attach the spacer to the frame with the original bump stop bolt. It’s the only one you can get a socket on in the depression. The bump stop then attaches to the provided bolt you inserted into the spacer using the provided nut. You will need a deep well 15mm socket for this attachment. Fortunately I had one. I set the spring using the 25% white spacer, reinstalled the wheels and set the truck back on the deck. The truck now sits 3/4” higher in the rear. I drove around and noticed that I was sitting a little higher as the site picture changed a bit. The truck didn’t seem to ride differently empty. If anything it seemed a little more cushioned though no less responsive. I towed my 9000lb travel trailer previously with a Ram 2500 6.7l diesel that had Sumo springs and a WD hitch. I got tired of the cost and maintenance and selected this Ford because it could haul the trailer. I chose the RAS over the Sumo springs because of how much squat I observed when I hooked up the trailer initially. I will update after I tow the trailer. My only concern at the moment is that the bump stop spacer isn’t going to provide enough clearance from the bracket.
Installation was pretty easy. I am not a mechanic and it was straight forward. I would say that the pictures included in the installation instructions are not detailed and don't show a good close up. Including a video QR code would be way better.
Otherwise, the vehicle sits a bit higher and the back end seems more solid.
I was a little concerned when they arrived as there was no instillation directions in the supplied literature. There was Ford, Dodge etc but nothing related to a 2023 Silverado 1500. I forged ahead using the universal instructions that were supplied. All turned out well. The instillation went much easier that expected. This is the second time in a month that I have ordered from etrailer.com. EXCELLENT fast service with lots of follow up on tracking etc. THAKS to all etrailer employees.
This is my second F150 with an RAS installed. With RAS, my 2023 F150 2.7 Supercrew (with HD payload package, rated to tow 10,100#) tows my 6000# Airstream completely level with no squat and no issue when paired with a WD hitch. And yes, I've done the same tow without RAS and would prefer not to do it again. Absolutely an improvement over stock with minimal impact to daily driving. It does raise the rear about 1-2" but nothing the average person notices and I forget about it all the time. I'd like a leveling kit to help raise the front/reduce the rake a bit but then it wouldn't tow level anymore so that's the compromise. The RAS does exactly what it claims to do, at a fair price, and maintenance free (no airing up or down etc.) The only improvement that would be better would be trading up to a 2500 or 3500 but that's not the daily driver experience I want for the 80% of the time I'm not towing. I did buy again when I traded in my 2017 and would buy yet again if I got another half-ton.
Received the package very quickly.
Installation is easy for the DIYer.
Have already used the Road Active Suspension on my F150. Stabilized the body roll of the truck while towing My travel trailer. Coupled with weight distribution and sway control system the conventional tow travel trailer was as stable as a 5th wheel tow. Haven’t had a chance to tow yet with my F250 but expect the same results. Like others have said it does not change the ride of the empty F250.
Product performs as it claimed. These are an excellent product.
Purchased for a 2018 F150 to assist with towing a 6000lb RV travel trailer. The heavy duty model is too heavy duty. With the pre-loading as light as possible, the unloaded ride is stiff. Would recommend the standard model. With the travel trailer (using an Equalizer brand weight distribution hitch), the ride and stability was much improved over just the factory leaf springs. The rear of the truck was raised over an inch. Installation was straight forward. A little bit of guessing as to the pre-tensioning and if they are matched left and right. Would love it if the design could be changed such that it was easy to "snap on" when needed and "snap off" when unloaded. Maybe some sort of lever system would make this possible. Overall, they did what they are designed to do - assist the truck in being more stable when under load and less squat. I ended up trading the Ford for a Toyota which has coil springs so I passed on the RAS to the new owner of the Ford.
I bought these after a 1000+ mile trip towing my trailer (~8000# loaded) with my 2013 F-150 (HD Payload & Max Towing Package). Installation was super easy. I did not need to take the tires off. There was plenty of room to get behind the tires and place and adjust the springs. Once installed they definitely give the truck a rake. I didn't measure pre-installation because I didn't expect the lift to be so great. I used the black disc to adjust the springs.
It's not too extreme but you can definitely see a difference compared to stock.
As you can see in the pictures, with the springs the drop with a trailer attached is greatly reduced and the truck sits level. Towing was great. I used a WDH before and being able to with springs only and a sway bar is pretty nice. Drop with trailer attached is only about 2.5 inches (see pics)
Wish I had gotten this earlier. Old Dodge ride 200% better without the 8k enclosed race car trailer. Can’t wait until we tow with it. Raised back end 4-5 inches.
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.
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.