Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Item # RAS3611-SLHD

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Vehicle Suspension RAS3611-SLHD - Constant Load - RAS
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  • RAS
  • Leaf Springs
  • Heavy Duty
  • Rear Axle Suspension Enhancement
  • Constant Load
3,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway. Lowest Prices for the best vehicle suspension from RAS. Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty part number RAS3611-SLHD can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (67)
  • Q & A (13)
  • Videos (1)
  • Photos
  • Why etrailer?

RAS Vehicle Suspension - RAS3611-SLHD

3,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway.


Features:

  • Heavy-duty custom kit converts your vehicle's factory leaf springs into a mechanically active suspension system
    • Actively strengthens leaf springs for improved ride quality with or without a load
  • All-in-one suspension system improves stability, handling, and control
    • Eliminates axle wrap, wheel hop, and bottoming out
    • Reduces dangerous sway and body roll while cornering
    • Keeps your ride level when towing or hauling a heavy load
    • Improves traction while breaking and accelerating
  • Variable-rated coil tension springs automatically adjust to your vehicle's load
    • Activate immediately to support the extra weight
    • Disengage when unloaded, allowing your leaf springs to perform as intended
  • Customizable coil springs can be adjusted during installation to accommodate your towing or hauling needs
    • Independently adjustable for side-to-side leveling of off-center loads
  • Helps extend the life of leaf springs, shock absorbers, shackles, and even tires
  • Durable, epoxy e-coated steel construction
    • Corrosion-resistant brackets on the ends of each unit have a salt spray rating of more than 800 hours
  • Easy, bolt-on installation - no drilling, cutting, or welding required
    • Unit secures under the leaf spring and around the factory U-bolts
    • Fully assembled kit and hardware are included
  • Maintenance-free - adjustments and monitoring aren't needed once installed
  • Made in the USA


Specs:

  • Weight capacity: 3,000 lbs
    • Roadmaster Active Suspension will not increase your vehicle's weight-carrying capacity
  • 2-Year warranty
  • 30-Day money-back guarantee


All-In-One Suspension System

When towing or hauling a heavy load, you may encounter a number of problems that can make your driving experience difficult or dangerous, such as sway, body roll, or bottoming out. When your vehicle is weighted down, your factory leaf springs can't counteract these problems to the extent that they are supposed to. The weight will overpower the leaf springs and cause them to twist or flatten out. When that happens, they cannot support, level, or stabilize your vehicle effectively. Additionally, because your factory leaf springs are passive, they won't begin to tackle problems such as sway until those problems have already started.


Diagram of RAS Installed

Roadmaster Active Suspension (RAS) kits enhance those passive leaf springs by converting them into a mechanically active, all-in-one suspension system. RAS kits have variable-rated coil tension springs that automatically adjust to your heavy load. Other suspension systems only solve a few problems and usually at the expense of other improvements your factory leaf springs may need. RAS, on the other hand, is a unique kit that provides everything you want in a suspension system without any trade-offs. It eliminates bottoming out like air springs, reduces sway and body roll like sway bars, keeps your ride level like helper springs, and improves traction and braking control like traction bars. This improves your vehicle's stability, handling, and control while you are towing or hauling, as well as when your vehicle is unloaded. RAS also makes your overall driving and towing experience safer and more comfortable, which greatly lessens driver fatigue.


How RAS Works

Close-Up of RAS Tension Spring

Each RAS unit has a powerful variable-rated coil tension spring that converts your passive leaf spring into a mechanically-active system. Once your vehicle is loaded, the tension springs immediately activate to absorb and support the weight. This allows your leaf springs to maintain their bowed position and keeps them from flattening out or flipping over, which greatly hinders their ability to bear a heavy load. The tension springs are variable-rated, which means that the heavier your load is, the more assistance they provide to your leaf springs. Because of this design, RAS reacts instantaneously, whereas hydraulics, air springs, and other suspension systems take time to react. And unlike your factory leaf springs, RAS stops sway and sag before they even start to happen. Additionally, when your vehicle is unloaded, the tension springs disengage, allowing your leaf springs to perform as intended without hardening your ride. RAS won't hinder your leaf springs' movement, nor will it cause any friction between any of the brackets.


Eliminates Axle Wrap and Wheel Hop

RAS Eliminates Axle Wrap

When under a heavy load, leaf springs are especially susceptible to axle wrap, which can cause wheel hop. Wheel hop is when the tires lose their grip on the road, causing a jarring, up-and-down movement. Axle wrap occurs when the circular motion of the tires cause the leaf springs to twist or rotate. If the leaf springs twist far enough, wheel hop can occur. RAS stabilizes your leaf springs by absorbing the force of the load they're trying to support. This eliminates axle wrap and wheel hop, as well as prevents your vehicle from bottoming out. Because of this, less strain is put on your vehicle. And by reducing some of this wear and tear, RAS helps extend the life of your leaf springs, shock absorbers, shackles, and even tires.


Reduces Sway and Body Roll

RAS eliminates sway and body roll

When driving along a curve while towing or hauling a heavy load, the back end of your vehicle or trailer can start to shift with that weight. If your factory leaf springs have flattened or twisted under this load, they won't be able to prevent it from shifting. Because of this, your trailer will sway away from your vehicle. This makes driving challenging and dangerous, as it increases the risk of body roll, which is when your vehicle drastically leans to one side. This can often cause you to completely lose control of your vehicle. Body roll is especially prevalent with multi-passenger vans and vehicles towing long campers, trailers, or boats. RAS provides a much safer ride by reinforcing your factory leaf springs and stabilizing your load. This helps prevent sway from occurring and reduces the chance of body roll while cornering, turning, and swerving. RAS also lessens the rocking motion that happens during windy conditions or when a semi passes by on the road.


Levels Your Ride and Improves Traction

RAS Levels Your Ride

When your vehicle is overloaded, the bulk of the weight transfers to the rear axle. Your factory leaf springs then become overwhelmed by this weight, as they are not strong enough to support it. This causes the back end of your vehicle to sag and the front end to rise, which means that the front tires have lost some of the grip they need with the road. In addition to loss of traction, it can also cause poor headlight aim, unintentional swerving, and an extremely bumpy and uncomfortable ride. RAS bolsters your factory leaf springs and enables them to provide support for your load without compromising ride quality or comfort. This keeps your ride level from front to back whether you are hauling a load in the bed or towing a boat, trailer, or camper. RAS also ensures that your tires have the traction they require while braking and accelerating, which improves the overall driving experience.


Customizable Coil Tension Springs

Adjusting Spring With Spacer

RAS is also customizable. During installation, the coil tension springs can be adjusted to 2 different tension settings or anywhere in between for improved road handling and support. To do this, rotate the springs while keeping the threaded rod still. As you turn the spring, use one of the 2 included spacers as a gauge to measure the widening gaps between the coils. In order for the RAS units to work as intended, you must tension the coils to a minimum of 25 percent with the 1mm white spacer and no more than 40 percent with the 2mm spacer. The springs can also be independently adjusted to compensate for off-center loads such as a handicap lift.


Easy, Bolt-On Installation

RAS Once Installed

This custom-fit kit comes fully assembled and is easy to install. Each RAS unit simply bolts onto your factory leaf spring with the included hardware, and drilling, welding, and cutting aren't required. First, position the eye hook bracket so that it wraps around the top of the factory leaf spring eye. Then the axle bracket secures under the leaf spring and around the factory U-bolts on the other side of the leaf spring pack. Once the maintenance-free RAS units are fully installed, you won't need to monitor them as you would with air springs.


Corrosion-Resistant Steel Construction

RAS Construction Close-Up

RAS is extremely durable and corrosion-resistant. The units are constructed of high-grade alloy steel, and they have an epoxy e-coat on the coil springs to provide extreme corrosion resistance. The brackets on the ends of each unit resist the effects of water and other elements, and they have a salt spray rating of more than 800 hours.



3611SL-HD RAS Custom HD Active Suspension System for OEM Leaf Springs - Rear Axle



RAS3611-SLHD Installation InstructionsInstallation Details RAS3611-SLHD Installation instructions

This Product Fits The Following Vehicles

2015 - 2020 Ford F-250 Super Duty

2015 - 2020 Ford F-350 Super Duty

2011 - 2014 Ford F-250 and F-350 Super Duty F-250

2011 - 2014 Ford F-250 and F-350 Super Duty F-350




Video of Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Roadmaster Active Suspension Kit Review

Today, we're going to take a look at the Roadmaster Active Suspension Kit, part number RAS3611. The Roadmaster Active Suspension Kit is going to help to convert our basic leaf spring kit into a mechanically active suspension. This is going to provide great assist for vehicles with the rear leaf springs without compromising any of their ride quality. It's going to help to eliminate any of the bottoming out or axle wrap that we can sometimes get, which is going to lead to great improvements and road handling. It helps to reduce the sway and the body roll that we often we get during cornering. The Roadmaster Active Suspension Kit works with or without a load. It's going to absorb and dissipate any load force that we might have when our vehicle is loaded, and whether it's loaded or unloaded, we're going to have improved vehicle stability, handling, traction, and control.

Now, when we receive our suspension kit, it's all going to be preassembled, really easy straight forward installation. We've got both sides here. We're going to have our instructions, our warranty registration, and even our spacers so we can fine tune the system. The thinner one, that's going to give us a 25% improvement. The thicker one, that's a 40% improvement. Now, the system itself is going to have a few main components.

We've got our eye-loop strap. We've got our main spring here in the center. This does all the work, and then, we've got our axle brackets here where they'll mount onto the truck. Like I said, really simple installation. We're only going to have to take care of getting one bolt to install it on the vehicle.

Then, we can make our adjustments on our spring. Now, our eyehook, our spring, and our brackets are full epoxy-coated. This is going to offer us up to $800 of salt spray protection. Even if we're using them up North or here in the Midwest, we're not going to have to deal with a whole lot of rust and corrosion. The threaded rod, all of our moving points here, and our bolts are going to have spacers that are fully treated as well, again to help prevent rust, and then, we're going to have some high-quality fasteners here to use as jam nuts to get it all locked into place once we've got it where we want it positionwise. Here on our eyehook, you can see we've got our articulating ball/socket setup. The same thing here on the other side, a rotating bar setup here.

This is going to allow both of our leaf springs full maneuverability, so we'll never have any of those binding situations to where it's kind of bound up or our spring gets caught, anything like that. The axle brackets themselves are fully adjustable to fit a wide variety of vehicles. You want to use whichever one most closely matches your setup. To start our install, we need to take the tires off each side of the vehicle. The way we want to set it up is we want the tires to be up off the ground but we want it to be supported or resting on jack stands. You can use those on each side of the axle and also in the middle on your center differential, they'll instruct you to use a jack. Just follow the instructions, they're going to tell you exactly how to get it set up so you can do the work. Then, we want to take the center caps, each wheel is going to be a little bit different. It might look just like this, it might have a center cover, or whatever, but remove both rear wheels once you got your truck properly set. For installation, we're going to grab the spring pack so that when our hook is oriented toward the back that our main bolt comes into the top part of the bracket. You see there Then, we want our hook to go right around our eye on the back of the spring there. We'll grab a couple of either 3/4" ratchets or 19mm and let's take our bolt out that's here on the end. It holds our spacer into place. Take that on out. Now, what we want to do is get one of our 5 holes so that we can have our bolt and spacer here behind the U-bolt block. To extend this length, what we need to do is hold on to the threaded rod while we turn our spring toward us. Then, we can bring our bolt back in and we go through the arm on our bracket, and of course we want to put our spacer on there. Then, we'll add on our nylon locking nut. You want to be careful if you've got any sensors or any wires or anything like that, that we don't have it pinched in behind there. Then, we're ready to tighten down our bolt. Now, we're not going to tighten our bracket down so much as to where it actually sandwiches our U-bolt here. What we're looking for is to tighten it down enough to capture our spacer so it won't move. That's going to be oriented right there just underneath our spring and all the way back against that block. Then, we'll take the slack out of the system by doing the opposite of what we did to extend it. Now, we want to take another look at our eyehook here. We want that to be centered on the spring pack. Then, we'll feel our spring actually get tight while we're turning it. Right there, it's starting to tension up a little bit. Now you see everything is locked into place and it won't be moving. Now, it's time to make our adjustment. While holding the nut that's located here at the end of our threaded rod, we'll need a 22mm ratchet. We can come to the other end with our 12mm and start tightening our spring. As we turn our small nut or bolt located here on the end, we'll start to see the gaps in our springs increasing. Periodically, we're going to want to take our disc and check. These discs, white as we said is a 25% increase, the black is a 40% increase, and they should barely pass through those rings. As you see right now, they're not and we need to keep going with it. Here you can see our spacer just barely passing through there, so we know we've got it set properly. If we're looking for extra performance out of the system, we can switch from the 1mm up to the 2mm, and we want to follow that same process. Now, we'll head over to the driver side and repeat that same exact process. Now, we'll get our tires put back on here and torqued down to specification, and then, we'll go ahead test out that system and see how it worked. Now that we've seen how it works, how it can help us, and how to install it, that's going to complete today's look at the Roadmaster Active Suspension Kit, part number RAS3611.


Customer Reviews

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty - RAS3611-SLHD

Average Customer Rating:  4.8 out of 5 stars   (67 Customer Reviews)

3,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway.

- RAS3611-SLHD
by:
Ford F-150

Great product! It does what it advertises and is a breeze to install on my F-150 but a little harder on the 350 since you have to remove the overload spring. Works great helps keep truck perfectly level when towing my 10k lb trailer. Highly recommend. 654976



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


I installed this kit on a 2017 Nissan Titan and can be installed very easy. The handling on my truck has improved tremendously. I would recommend this product to everyone. 528359


Comments

When I installed it I set it up for 25 load and I pull a 9000 lb dry weight 5th wheel. The suspension kit is still doing its job.

Bill - 06/29/2019

57259

- RAS3614-T
by:

Review from a similar RAS RAS in Vehicle Suspension


I have Nissan 2500 van that I have converted for traveling. Its gross weight is 9000 lbs, and with all that is in it everyday it weighs around 7000 lbs. It has enough weight it sags. I occasionally pull a trailer, which makes the sag even worse. I install the RAS, and it added about 1 1/2 inches to the truck height. I haven't pulled with it yet, but around town it rides great. Maybe, a very slight stiffening of the suspension, but nothing like what Timbren does to a truck. These things were terrible to install. The instructions said there wasn't much clearance on this vehicle, so take apart the unit and put the spring hooks on before lifting the vehicle. I thought I was going to have to unbolt the springs. Using a jack in the right place allowed me to finally getting them into place. It did require much frustration, and some choice language before I finally got them installed. I'm still looking forward to towing with them to see if the sag problem is fixed. I do recommend these. Again on a Nissan van they are a b*tch to install. 650068



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Easy to install. The Roadmasters did not really change the ride of my 2017 F-150 when not towing. They made it much easier to level the truck when towing. 598577



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


I’m impressed by the quality and engineering of this product. The person who designed it should win an award! I installed this on my 2013 F150 in preparation for hauling around my 1998 24’ coachman I’ve been working on fixing up all winter. I didn’t want a solution that would stiffen up the trucks ride because it’s very comfortable. I can’t feel any change in ride. Installation was very easy, took about an hour for everything and just a few tools. I haven’t towed with it yet but I did hook my trailer up and it didn’t squat like it did before. So far, very impressed. I’m glad I didn’t mess with airbags and all. 629033



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


Install was effortless I set to 20% have not put under a load yet. purchased for added stability pulling my flat bed trailer with my tractor. body roll is definitely better thank you. 607627



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Worked as described and made a big improvement towing our travel trailer. 526259



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


I have had this product a couple of months now with two trips pulling my travel trailer. It has helped in leveling out the truck/trailer so that less pressure is applied to the weight distribution system. Product is easy to install, I didn’t even need to take the tires off. It also is easy to adjust to fit different hitch weight. It did make my truck ride a little ruff but not to a point that is uncomfortable. I chose this product over air type products as I didn’t want to have to mess with it. I would recommend this product. 593932



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


I installed the product easily within less than an hour. On the test drive after, my truck rode smoother and more precise than prior to the install. I gained about 1-2 inches in lift on the back end, but have not towed with the setup yet. I would recommend this product. Very satisfied so far. 617063



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Thanks I put the springs on today’s. I have one question, I adjusted them to the 20% / one millimeter. Can they be adjusted to the 40% with truck sitting on ground if my trailer still has the bounce in it when hooked, or will I need to lift it off ground to readjust if needed. 590227


Comments

According to the manufacturer, when the suspension system is adjusted, the vehicle must be raised with the axle hanging free. This releases most of the spring tension.

-- Mike L - 12/12/2018

46660

- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


We received suspension kit yesterday. My husband installed immediately. It took him a little longer than expected. But he is so happy!!! His Toyota Tundra is driving and handling so differently.... in a good way. We have not hooked up to trailer yet but I'm sure we will be totally happy. Good product! 408485



- RAS3611
by:

Review from a similar RAS RAS in Vehicle Suspension


Repeat customer. Just installed my second set of Roadmaster Active Suspension springs. Have not towed with them yet; however the ride on my 2014 F150 6.5' bed pickup is noticably smoother. I expect the result when I do tow my travel trailer to be the same as with my previous truck - night and day difference (no more "white knuckle towing)! 319927



- RAS4514-SAT
by:

Review from a similar RAS RAS in Vehicle Suspension


Had the kit installed today at the local Toyota dealer on a 2019 Tacoma. The truck had a greatly improved ride and seemed to have a more steady rear end feel. I plan on towing an RV in a few weeks and to the mountains in July, and have a greater confidence in performance. It did raise the back a good 2", it doesn't look bad, as I had expected. I firmly believe that this was the right choice, I can't wait to put it to use! 611821



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


I've attached two pictures regarding the items I've recently purchased and installed upon my truck from etrailer.com 610664



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


For anyone on the fence, I will say it does work well. I'm not sure it is worth it, but that's the price. Also, as others have said, finding your tools is the hardest part of the Installation. 2018 F150 Platinum pulling a 2018 Passport 2920bh 546842



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


As with many other reviewer's I researched several different brands and types of systems. The springs have helped out immensely with the tongue weight I have to pull with my F-150. I notice a 2 to 3 inch difference in the ride height with the springs on while towing approximately 1200 to 1400 pounds of tongue weight. It also takes out the bouncy feel from truck to trailer on non-smooth roads. The installation is very simple and quick. I highly recommend this product. 443416



- RAS4611TD
by:

Review from a similar RAS RAS in Vehicle Suspension


I really like the suspension add on. It keeps my truck level when towing our 9000 lb camper bumper pull. I get great stability on the road and it helps with handling the tongue weight on my 2013 Toyota Tundra 1/2 ton. It doesn't change the stiffen the suspension of my truck until I add weight. So, you don't notice it with normal driving. Installation went smoothly. The components were high quality and heavy duty. I recommend it. 577747



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Delivery was on time and the product was good and ready to go! Jacked up the truck put it on stands and 1hr 30mins later I was driving off for a test run. Works just like it says it would. No body roll, takes off so much smoother, and I did about 40 over those big rolling neighborhood speed bumps and it was super smooth. Before RAS it would have a real bouncy feel over the speed bump now it attack the bump if you know what I mean. I tow a 25' trailer so I can't wait to see how much bounce is taken out when I'm driving over the dippy roads through the mountain pass here in WA. Thanks E-trailer! 313970


Comments

My initial review was was 5 star rating and after one year of use it still remains a 5 ??. I have a chance now to tow my 25’ travel trailer for a season and works great. It helps with proposing and reduced the little sag when I have her loaded up for a long trip. Highly recommend RAS with a WDH combination for smooth comfortable towing experience.

Doug D - 11/05/2017

30566

- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


I received the item I ordered on time. Very nice to deal with. I plan to order from etrailer in the future 459351


Comments

Pulled our camper to Florida and back last winter. Doing the same again. The RAS worked great. I am definitely satisfied

Roger - 12/11/2018

46593

- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


Haven't towed or hauled anything heavy with it yet. Unloaded it does help with body roll in turns. The ride is slightly improved as the truck doesn't bounce as much. 519027



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


arrived as expected. Extremely easy to install as the spring assemblies were completely assembled. Took longer to take tires on and off than to install spring assemblies. Effect on ride when towing has yet to be determined; I am expecting a big improvement in ride. 569774



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


I bought this based on I think the same product I bought several years ago for a 1997 Dodge Ram 1500. At that time, I bought a kit for for a Ram 2500 and was very impressed. I put a truck camper on the Dodge and I don’t think it settled an inch and when I drove it I hardly knew the camper was back there at all. No sway and no handling problems at all. This time I bought the kit for a Nissan Titan, pulling a 25’ travel trailer (about 7000#). The truck rear still settles and is not in a level attitude in transit without the weight distribution hitch. The suspension kit makes it better but not as much as I expected. 565780



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


After going back and forth with your install techs before purchasing they said what product to buy. I order it and doesn't fit my truck due to flipped rear axle I gave them pics so product was returned 411832


Comments

Hello David, I am sorry this product did not fit your truck. I spoke with our Roadmaster Techs and they told me this kit is not a fit for your truck since your truck suspension is not factory spec. This kit is only confirmed to fit the fit-guided vehicles with factory suspensions.

-- Sarah H - 08/02/2017

26776

- RAS4611TD
by:

Review from a similar RAS RAS in Vehicle Suspension


Mounted on 2015 Tundra ,pull heavy car trailer and toy box these work great and are adjustable. Unlike airbags they won't leak and much easier install. They helped level truck when I'm loaded and resolved some front braking issues with the sensors on these new vehicled. 319138



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


After debating whether to go with these or airbags for a year I’m very happy with my decision to purchase these for my 2015 F150. Installation was simple, the difference in ride and towing is great, and there’s no maintenance. With 1,000lbs of trailer tongue weight and improved stability, I’m a happy camper! 583586



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


ordered on tuesday arrived on friday Free shipping that was fast. Installed on Saturday morning. after I got the truck on the Jackstands took all if 20 minutes to install. haven't towed anything yet going camping this coming weekend will report more, truck rides better unloaded that before, great customer service 508437



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


I did a lot of research to determine if I should use airbags or the RAS. For my application the RAS was the better choice. No matter who I asked, no one had a negative comment about this product (RAS). I tow a Jayco Travel Trailer (TT - 9000lbs) and while I have towed boats for years I was new to the type of tongue and hauling weight that the TT exerts on my vehicle. Installation was a breeze. I spent more time preparing my tools and finding my 22mm wrench than I did installing the RAS. There are many Youtube videos on how to install the RAS and I do recommend you watch them. My ride (F150 Echoboost) was smoother while pulling the trailer; however, I didn't feel any change to my daily driving (positive or negative). If you're using a WDH, I recommend these over the airbags. The airbags can be counter intuitive since the WDH should fix most of the weight distribution and level. The RAS works well with all WDH's and once installed you don't have to make any changes to it, unlike the airbags. Get the RAS - you'll be happy you did. 399233



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


I order these on Friday afternoon and I received them Monday afternoon. I had watched the clip on installation before ordering and it looked pretty easy. The installation instructions are very self explanatory and they were easy to install. From the time I starter until I had the tools picked up and put away it was about an hour and that was with taking a few phone calls. My initial ride after installing these was very good. I drove over a fairly rough road and tracks. My real test will come when I hook up to my trailer and load my tractor or car. I may have to readjust to a heavier setting but it is there if needed. 438869



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Installed the Roadmaster auxiliary springs on a 2018 F150 Screw FX4 (max tow package; 7000 lbs rated payload capacity) because I've been unhappy with how much the rear squats when towing an enclosed car trailer (I use a weight distributing hitch), and a bit displeased with how the truck handles bumps, dips, etc. For whatever reason, Ford installed a weaker leaf spring pack on this truck / model (one fewer leaf spring than on earlier model I owned with a 7200 lbs payload capacity). In general, maybe because of the FX4 package, maybe because of the smaller wheels on this truck than my older F150 (18" vs. 20"), there is much more range of uncontrolled motion in this 2018, and much more bounce and jarring over uneven pavement. In my opinion, the rear leaf spring pack and shocks -- on this truck -- are not well matched. After considering air bags or an auxiliary leaf spring, I contacted Etrailer and chatted with a rep, who guided me to this Roadmaster unit. The rep was very helpful and took the time to discuss how I used my truck in order to determine the best option for me. Since I do not tow frequently (12-15 x per year), and my tongue wait varies between 600 - 700 lbs, the Roadmaster seemed to be a good middle-of-the road option over air bags, which require constant monitoring (not a big deal if you use your truck all the time). I wanted a "set it and forget it" option, and the Roadmaster was designed to be just that. The units installed very easily (I have access to a lift), the instructions are clear, and there's a very helpful video available on Etrailer's site. Most importantly, the ride smoothed out immediately as compared to stock. I set the units for the maximum payload increase rating (40%), which raised the rear end enough that the truck now looks a bit like a late '60s - 70s American muscle street rod (not a look I was trying to achieve), but the ride is far superior to stock. The truck no longer bounces, jars, or deflects to any significant degree, but the ride remains supple and smooth (I know, strange description for a truck). This is not to say that the stock ride quality was generally bad, but it certainly needed improvement for my tastes and needs. Unfortunately, I've not had the opportunity to tow with the auxiliary springs at the time of this review, but I am certainly optimistic that the ride height will now be level, and the ride quality improvements will be retained while towing. This is a good product, well made and supported, and Etrailer was a pleasure to work with. Very helpful sales representatives, fast shipping, and good customer support. 538434



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


2018 F150 4x4 owners pay attention to this review. I received the order today and unfortunately it was the wrong kit for my vehicle. Even though etrailer confirmed that a RAS3611-B is correct for my truck, it is actually for a F150 4x2. I contacted etrailer and costumer service rep was great and verified that initially the same part number came up for my vehicle, causing the confusion. My mistake, etrailer mistake. The correct kit for a 2018 Ford F150 4x4 is RAS3611-Y. etrailer is splitting the cost of return shipping and my correct kit has been ordered. etrailer has great costumer service. 567680



- RAS3621
by:

Review from a similar RAS RAS in Vehicle Suspension


High quality components. We installed the Roadmasters on my 2000 Ford Excursion yesterday. The instructions for installation were clear and concise. The installation took about 45 min. A god bit of that time spent on jacking, wheel removal and replacement. Not a particularly difficult installation. My impressions after test drive: I think the ride was slightly harsher than before installation, but nothing significant. The sway control was greatly improved. Surprisingly, the vehicle seems to handle bumps better, and unexpectedly, braking seems better. All in all, a good upgrade at a reasonable price. Jim 563475



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Outstanding service 473151



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


I've only done a couple quick test drives with the product after installation. However so far am i initial impression is very positive. 450228



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


I received my order a day earlier than estimated. That was nice. But, when I started the installation the next day, I immediately encountered a problem when installing the enclosed bracket for the emergency brake cable. The instructions state the O.E. bolt is 10mm. On my 2017 F-150 the bolt is 13mm and does not fit in the recessed hole on the supplied bracket. I'll unfortunately be making a trip to the local hardware store to find a bolt that will work in order to complete the installation. 540518


Comments

Thanks for the info, I have spoken with my contacts at Roadmaster Active Suspension and they have not heard about this issue, but their development team is looking into it to see if they need to update the bolts included.

-- Rachael H - 07/13/2018

40878

- RAS3611
by:

Review from a similar RAS RAS in Vehicle Suspension


I have been using Roadmaster Active Suspension for a year now. The product works as advertised and has greatly improved the stability of my F-150 pulling a 7500 travel trailer. 444685


Comments

I have my RAS system for two years now and it performs as well the day I installed it.

Chris - 10/21/2018

44879

- RAS4514-SAT
by:

Review from a similar RAS RAS in Vehicle Suspension


Prompt shipping, good price, happy. The Roadmaster was easy to install and works as advertised. Truck used to squat under weight. Now even with the riding mower in the back, I cant even tell its there. No squat and good handling. Unloaded there is no effect on ride. Cranked to max, raised the rear about an inch. Like them. 364203



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Big improvement in my trailer towing. I have an F150 and tow a 36' 9000lb travel trailer. My trailer is on the larger size for my truck and these springs have corrected the trailer sway I was experiencing. Easy to install and I have them tightened to the 40% additional load spacer which did raise the rear of my truck by an inch. So I've also had to readjust the WD hitch settings, which may need some minor tweaking. But this suspension kit is working as advertised by reducing the trailer sway. Now my wife can relax a little more! 515597



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Just like your advertising said they were very easy to install. My ride has not been affected it still is a great ride for a truck. After the installation the rear end of my truck was 2” higher which will help when I hook up my camper, instead of sagging now my truck is level they are a great product . Thank you 540473



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


etrailer has amazing customer service and after talking through a few options for my 2015 Silverado Crewcab shortbed, we decided this product would be the best fit for what I wanted. The RAS comes put together and installs very quickly. It took me longer to get my tools rounded up and the wheels off than to install the RAS. I did set mine to 40% using the thicker gauge for the coils and it appears that added a little height to the back of the truck. No biggie as I planned on leveling blocks later anyway. The ride is definitely firmer and everything the product states about mitigating body roll, bumps and adding traction has held true so far. While I think the product is a little spendy compared to other options, it does more and is well worth the cost. I haven't had a chance to load the bed down yet, but the experience has been very positive unloaded. Thanks etrailer for excellent customer service and great pricing. 542212



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


product came very fast! all was packaged extremely well and no damage to any of the items I ordered. I have not installed them yet but I am excited to get them on and hopefully see that they take that little extra sag out of my truck while pulling my travel trailer! watched many video's on the installation process and seems to be very simple and straight forward... thanks etrailer 307783



- RAS3611-B
by:

Review from a similar RAS RAS in Vehicle Suspension


Installed on my 2015 F-150. Great product. Easy installation, took longer to get the wheels off than it did to put the springs in. Adjusted to the 2mm spacing and it raised rear fender well height by 1". Improved unloaded handling and towing. Have recommended to friends and will have on any of my future vehicles 565608



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


Install was fairly easy, 1 1/2 to 2 hrs. Raised rear of 15 Silverado 1500 1 1/2”. Towed camper 50 miles, much improved. 525890



- RAS3611
by:

Review from a similar RAS RAS in Vehicle Suspension


only drove twice so far. already feel great control of the rear end. much increase of positive traction, with very little drop. extremely easy installation! perfect step by step(with pics) instructions included. also easy to follow video, somewhere. I cant remember where I watched. not hooking up trailer till next weekend, after alignment. maybe I'll be back. overall the "active" concept in this product is exactly what an intermittent hauler wants. there is no feel of preload on leafs when not loaded. the product creates much better roll stability. 2013 silverado 2500hd 691029



- RAS4611
by:

Review from a similar RAS RAS in Vehicle Suspension


The product was very easy to install, and was very happy it didn't effect the ride of the 1/2 ton truck. Looking forward to see how it handles towing my 28ft travel trailer 690798



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


I own a 2017 F150 and placed the RAS3611-y kit last year. So far the ride improvement and the handling when pulling my equipment trailer with 7000# load is great. Air load adjusters would have been a mistake. Thanks George J. for a great product. No need for load levelers with this kit. 675401



- RAS3611
by:

Review from a similar RAS RAS in Vehicle Suspension


Great customer service! All throughout the order, I was notified up-to-date info on the status. And the product was just what I had ordered. This company reminds me of that MEGA online company with how they processed the total order. Keep up the good work! 669310



- RAS3621-HD
by:

Review from a similar RAS RAS in Vehicle Suspension


Installed on a 2003 Ford Excursion. Install was fairly simple, just having to get the tools to tighten was a bit tricky. Have been using these for over a year pulling a 30ft camper. Did not want to install air bags and only need a little bit of extra support when towing and these did the trick perfectly. 669295



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


I made a mistake when I ordered my part. They corrected my mistake and the right part still came the same day the other part would have shown up. Great customer service! 666220



- RAS3611-Y
by:

Review from a similar RAS RAS in Vehicle Suspension


Worked as expected. Very pleased. 658908



- RAS3614-T
by:

Review from a similar RAS RAS in Vehicle Suspension


2019 Nissan NV 2500 Cargo van owners please read! Etrailer sent the wrong parts the first time, but they took care of it right away. Their customer service is great and this review should not reflect upon them. The RAS seemed like a good solution to level the vehicle and reduce body roll, so I ordered them and installed. With the RAS at 40% and recalibrated at 40% after a test drive, it seems to do nothing. It does help if the van is totally empty, but who drives around an empty cargo van? I was at about 1/2 of the max payload and it still sagged in the back. I can’t speak for other applications, but this is not a good fit for Nissan NV. You have to remove a leaf spring bolt on this application while installing so it will hook between the spring and shackles. I wound up taking the van to a reputable spring shop and had the leafs built up. It only cost me $100 more than the RAS, and now it drives like it should. 656563


Comments

I spoke with my Roadmaster representative, and he explained that with this product, it is important to remember that it is designed to strengthen the existing leaf springs not resist and keep the vehicle perfectly level at all times. Anybody installing the kit should expect a little bit of give in rear leaf springs initially, then engage even more proportionate to and to counteract shifts in weight and uneven road surfaces, otherwise you’d expect a harsh ride to due lack of flexion in the leaf springs. Generally, if the vehicle is squatting up to 3-4 inches at the wheel well before installing the Roadmaster you should expect our kit to stay near level with somewhere between ¼’’ – 1’’ of give after installation. Beyond that, our kit will still help but from a load leveling standpoint it simply won’t be as noticeably effective. The vast majority of customers in the market for some sort of suspension enhancement product like this fall into this category. For the extremely heavy haulers & towers on the higher end of the spectrum that don’t want to purchase a bigger truck, they will usually tell them to go with an air bag set up.

-- Mike L - 07/25/2019

58213
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Ask the Experts about this RAS Vehicle Suspension

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  • Recommended Easy to Use Suspension Enhancement for 2019 Ford F-350 Super Duty
  • We have the perfect suspension enhancement kit for your 2019 Ford F-350 Super Duty pickup, the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit. This is the best because as the name implies it is an active system which works to continually reinforce your original leaf spring suspension and is extremely easy to install and requires zero maintenance once have them on your F-350. There are two different kits depending on your truck: - Roadmaster Active Suspension Custom...
    view full answer...

  • Which TorkLift StableLoad Suspension Enhancement Fits a 2016 Ford F-350 Dually
  • If your 2016 Ford F-350 has factory leaf springs with lower overload springs then you would need # TLA7310. If the truck does not have lower overload springs but instead has upper overload springs then you would use # TLA7200. It basically depends on where the overload springs are on your specific model truck. Another option for models that have upper overload springs is the Roadmaster Active Suspension system # RAS3611-SLHD. This is the option that fits dually models. So if you have...
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  • Roadmaster Active Suspension Enhancement Recommendation for 2016 Ford F-350 for Towing Camper
  • For fifth wheel towing it really is going to depend on the weight of your trailer whether you would want the standard duty Roadmaster Suspension Kit part # RAS3611-S or the HD version part # RAS3611-SLHD. One big factor to consider is whether or not you have a dually axle. If that's the case the only fit is the HD version I mentioned part # RAS3611-SLHD which most likely would be best fit since fifth wheel trailers can be pretty heavy. If you have a lighter trailer relative to the...
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  • Bouncy Ride from the Timbren Rear Suspension Enhancement System on a 2012 Ford F-250
  • I spoke to my contact at Timbren about the Timbren Rear Suspension Enhancement System part # TFR250SDG for your 2012 Ford F-250 and they informed me that the upper metal bracket cannot be removed. Therefore, the bump stop cannot be directly attached to the frame without this bracket. I have two options for you. You can use a shorter bump stop that will reduce the occurrence of the bump stops engaging. For this you would want to use the Replacement Rubber Spring for Timbren Rear Susp...
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  • Can Air Bags be Installed on a 2011 Ford F-250 with B&W Gooseneck Hitch Installed
  • All of the air spring kits for the 2011 Ford F-250 mount to the sides of the truck frame rails. The issue is that the B&W gooseneck hitch brackets also install in the same location but on the outsides of the frame rails. This would not be a problem if the B&W brackets holes in them to match the frame holes located directly above the axle. This is the hole that nearly all of the available air spring kits use for your truck. You would have to drill the holes into the B&W brackets. If you...
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  • How to Tell if 2019 Ford F-250 Has Overload Spring for Picking Out Roadmaster Active Suspension
  • For your 2019 Ford F-250 there are two Roadmaster Active Suspension kits for your truck available. There's the part # RAS3611-SLHD which is intended for versions of the vehicle that do come with overload springs and there's the # RAS3611-S which does not. Go look at the rear springs on your truck, you should see a bundle of metal springs held together with a metal band. If you see a spring on top of this that looks separate and angles up to make contact with a bracket on the frame that...
    view full answer...

  • How to Tell if 2015 Ford F-250 Has Overload Springs for Selecting Roadmaster Active Suspension Kit
  • Look at the rear leaf springs of your 2015 Ford F-250. You should see a bundle of metal springs held together with a metal band. If you see a spring on top of this that looks separate and angles up to make contact with a bracket on the frame that means you have the overload spring and would want part # RAS3611-SLHD. If not then you would need the part # RAS3611-HD instead.
    view full answer...

  • Roadmaster Active Suspension Enhancement for 2002 Ford F-350 with Factory Overload Springs
  • I spoke with my contact over at Roadmaster Active Suspension and there is a kit for your 2002 Ford F-350 with factory overload springs. It is # RAS3611-SLHD. But you will have to remove the factory overload springs to install it. The system though will more than make up for any capacity lost and you will also get all of the other benefits of the system including stability and better ride quality. This item also comes with spacer plates to take up the gap from the factory overload springs.
    view full answer...

  • Roadmaster Active Suspension System for 2012 Ford F-250/F-350 with Factory Overload Springs
  • If your 2012 Ford Super Duty has an overload spring ABOVE the leaf spring pack then you would need to use # RAS3611-SLHD. Then, to use the Roadmaster active suspension system # RAS3611-SLHD, the top overload spring will have to be permanently removed.
    view full answer...

  • Recommended Suspension Enhancement for Rough Ride of 2011 Ford F-250
  • All of the suspension enhancement products are designed to improve the ride of a properly functioning factory suspension system. The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit options are great at assisting whether loaded or unloaded. There are two different options depending on if you have top overload springs or not. If you have the factory top overload springs you will want # RAS3611-SLHD. If you do not have the factory top overload springs then you will want...
    view full answer...

  • Suspension Enhancement for a 2012 Ford F-250 with 4 Inch Lift and B&W Gooseneck Hitch Installed
  • Because your 2012 Ford F-250 has a lift kit installed and already has a B&W gooseneck hitch installed I recommend taking a look at some suspension enhancement products that will not interfere or require you to return the vehicle to stock height. Take a look at the Roadmaster Active Suspension systems we have. There are several models depending on the configuration of your truck. For a 4x4 or 2-wheel drive model that does NOT have top overload springs you can use kit # RAS3611-S. This...
    view full answer...

  • Does Overload Spring on 2019 Ford F-350 Need to be Removed to Install Roadmaster Active Suspension
  • To answer your first question, yes the top overload spring on your 2019 Ford F-350 dually does need to be removed in order for you to install the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-SLHD, as you can see by the cut out of the instructions I have added. In regards to raising the rear of your truck when it is unloaded, the RAS kit will not raise it at all, no. One of the great things about this enhancement is that it is an "active" system which essentially...
    view full answer...

  • Could Roadmaster Active Suspension Kit be Installed with Air Lift Air Bag Kit
  • It would be a bit redundant and in reality would give you a pretty harsh ride if both systems were engaged but it is possible to install Roadmaster Active Suspension kit part # RAS3611-SLHD at the same time as an Air Lift kit part # AL57596. If you found yourself in a situation where you needed both you are probably way over the towing capacity of the vehicle anyway.
    view full answer...


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Info for this part was:

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Expert Research:
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Photos by:
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Written by:
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Updated by:
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