RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty
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1992 Ford Explorer
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1992 Ford Explorer
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When you’re towing a camper or hauling a heavy bed load, sag and squat can throw off your steering and braking. The RoadActive Suspension Custom Leaf Spring Enhancement Kit adds up to 3,000 lbs of extra support by turning your factory leaf springs into a mechanically active suspension system. It keeps your ride level under weight so your tires maintain traction when braking or accelerating, and your headlights stay aimed where they should.
Big loads shouldn’t mean a harsh ride when empty. The variable-rated coil tension springs automatically adjust to your load so they activate as soon as weight is applied and disengage when unloaded. That means responsive support when you need it and comfort when you don’t. Each spring can be set during installation between 25% and 40% tension with the included spacers, giving you the right balance for towing or daily driving.
Cornering with a trailer or cargo can cause sway or roll that makes handling unpredictable. This system strengthens the leaf springs to reduce dangerous sway, body roll, and bottoming out while stabilizing your load. By absorbing load force energy before the springs flatten out or twist, it also eliminates axle wrap and wheel hop for smoother traction and steadier control through turns and curves.
Each unit is built from high-grade alloy steel with an epoxy e-coat finish for outstanding corrosion resistance. The end brackets are rated to over 800 hours of salt spray exposure, so they stand up to water, salt, and road grime. Once installed, the setup is maintenance-free—no air lines or monitoring needed—so you can focus on driving instead of adjustments.
Getting real suspension support doesn’t have to mean drilling or welding. This heavy-duty kit comes fully assembled with all required hardware and bolts directly to your existing leaf spring and factory U-bolts. Just mount it up, set the tension, and hit the road with confidence knowing your suspension is ready for whatever load you throw at it.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody. Andy here with etrailer.com. Let's take a real quick look at this Road Active Suspension custom leaf spring enhancement kit. Now this kit has been designed to fit your 2014 and newer Ram Pro Master 1500, 2500, and 3500, and on custom fit parts such as this kit, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year make and model of your vehicle and our fit guide will confirm if this will work for you or if we have something comparable that will work for you. Now this heavy duty system is gonna transform your ProMasters factory rear leaf springs into a bold, mechanically active suspension system.
It's gonna automatically strengthen those springs, providing you with improved ride quality regardless of your load and maintaining that smooth driving field whether you're towing a trailer or running errands unloaded. You just have a weight capacity of 3000 pounds for the rear suspension. So it's going to take on everything from trailers to heavy camper vans very easily. Now, if you've ever felt like your trailer was swaying or your vehicle was leaning drastically in a turn, this system is gonna tackle those common nuisances head on. By absorbing and equalizing the weight this system is gonna drastically cut down on sway and body roll.
That's all too familiar with heavy loads. This is gonna offer superior stabilization reinforcing your vehicle's load and limiting rocking motion so you're gonna feel safer even in windy driving conditions or when passing large trucks. Now one of the standout features is the adjustable coil tension springs. You're gonna be able to tailor it to your unique needs at installation by choosing from two tension settings plus any required adjustments in between. So whether you're balancing a heavy camper van or hauling uneven loads like handicap lifts, you can get side to side leveling for improved ride handling and personal comfort on every trip.
So just to kind of give you an idea of how this is gonna be installed on your springs, there's an image I have there on your screen showing you what this is going to look like when it's installed. So it's relatively overall a a pretty simple install. So whether you're loaded or unloaded, these springs are gonna respond instantly. They engage immediately under load to maintain your leaf springs curvature. So that's gonna help prevent sag and it's going to ensure all tires maintain grip on the road for optimal traction.
Not only does this improve your towing experience, but it's also going to to ensure that your headlights in correctly and your drive remain smooth without those unsettling jostles or jolts. It's gonna make towing that trailer or hauling that camper feel effortless and secure with this solution. So again, this does have a weight capacity of 3000 pounds. However, an important note to make is these do not actually increase your vehicle's weight carrying capacity. So you do wanna make sure that you're not exceeding your manufacturer's recommended weight limits. You are going to get instructions to walk you through the easy installation process. And if you do pick this kit up, we would love to hear back from you regarding your experience with getting these installed and using them so you can share your experiences with us by dropping a comment or leaving a review on this product page. And if you have any other additional questions, don't hesitate to reach back out to us. We do wanna make sure that you're getting exactly what you want and need. Well, that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Ratings & Reviews
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!
The Road Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty was installed on a 2025 F350. What I did not care for is that to install this you must omit the factory overload spring. This was not made clear if at all before purchase. Did we get any benefit from Road Active Suspension no.
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.
It’s still early, but installation was straightforward. The Tundra handles the 5th wheel tongue weight well. I have not driven it unloaded yet, but it doesn’t feel harsh.
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!
Haven't trailered with these installed yet but they installed easy and gives a nice ride. Will update once we start trailering.
My tundra handles better and these were a easy install. Under 3 hours.
Worked well on leveling 1,000 lb tongue weight
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.
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)
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