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  1. Vehicle Suspension
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  4. Rear Axle Suspension Enhancement
  5. Standard Duty
Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit

Item # RAS3611-B
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Our Price: $499.00
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2,000-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 part number RAS3611-B can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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RAS Vehicle Suspension - RAS3611-B

  • Leaf Springs
  • Rear Axle Suspension Enhancement
  • RAS
  • Standard Duty

2,000-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:

  • 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: 2,000 lbs
    • Roadmaster Active Suspension will not increase your vehicle's weight-carrying capacity
  • 5-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.



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

Installation Details RAS3611-B Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - RAS3611-B

Average Customer Rating:  4.7 out of 5 stars   (427 Customer Reviews)

2,000-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.

by:

I put these on my 2018 F150 and towed a fully loaded 17' foot cargo trailer from from Washington to Florida through bad weather and even performing some high speed emergency avoidance. I feel that the safety of that trip relied heavily on the positive effects of Roadmaster on my suspension!



by:

I installed them on a 2015 F150 2WD. Pulling a trailer with about 750 ponds tongue weight. Before the RAS my truck dropped 3 1/2 inches in the back and raised 3/4" in the front. With the RAS the back still dropped 3 1/4" and the front raised 3/8". They say it doesn't affect the ride without a trailer hooked up. I would strongly disagree with that statement. The ride and handling are affected and not in a good way. Much stiffer. With the trailer hooked up the truck does seem to be more stable, although I have not pulled it a long distance. I am mainly disappointed that it basically did nothing to help the rear end sag. I tried both wafers for adjustment. Not much difference.


Comments
Not good. I removed them after a long trip. Going back to airbags that way when not towing I can let the air out. With RAS and trailer hooked up the truck rode like a dump truck. I would not recommend and would give it a one star rating. I feel like I wasted my money.
Carl - 08/24/2021

by:
2016 Ford F-150

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


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.
-- Etrailer Expert Sarah H - 08/02/2017

by:

I like the way that I can track the order status from the person preparing my order to the time it is delivered. It feels like it is very personalized. Thanks for getting my order delivered earlier than I expected.
With RAS, My ride feels stable and more planted to the ground.



by:

These look well constructed and it's my hopes that it will solve the proposing I am having while I tow a 35'travel trailer. I will keep you posted if they work as promised



by:

This product is excellent worked out perfect that’s y I’m back buying another one for another truck


Comments
It’s working just like the first day great product
Eddie - 05/14/2022

by:

I am a first time truck and trailer owner. Talked to friends and did my research and decided on airbags. Purchased Airlift bags. They gave me the worst ride around town, my F150 drove like a bouncing tank and didn't improve the towing ride at all, made it a little worse. So I decided to return those and went with Roadmater AS. My truck around town felt better than factory. My truck takes corners better than any of my friends truck. Towing is smooth and sway in no more.



by:
2017 Ford F-150

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.


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.
-- Etrailer Expert Rachael H - 07/13/2018

by:

This system works like a champ!!! I installed it for smoother towing of my travel trailer/toy hauler and it’s made a huge difference. No regrets!



by:
Ford F-150

Great Product! Installed easily and really does the job. I put these on my F150 to assist in towing a 3200 pound RV. I hate stabilizer hitches wanted something simple and this met the bill. We tow down the road with no up and down sway...



by:
2015 Ford F-150

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!



by:

Really helps with towing and stability when hauling large loads. I never go more than my vehicle’s specs, but when I’m close to the max these help a ton.



by:
2018 Ford F-150

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.



by:
Ford F-150

It was easy to install and adjust.
My
F150 tows my boat with ease. It performs well hauling heavy loads



by:
2015 Ford F-150

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



by:
Roadmaster

This is the second time I have ordered from etrailer . Great service and fair prices. The Roadmasters were not as easy as I expected. A call to support got me straightened out. The job Roadmaster says is about an hour took me four.



by:

Really great product. Install on 2017 f150. The truck bounced because it was lite from aluminum frame. It's suspension was weak. My trailer with my small tractor seem to over load rear suspension. Load was for below truck tow rating. Caused problems loading and unloading tractor. Roadmaster really changed the suspension for the better. Truck is very stable and much smoother with and without trailer. A GREAT PRODUCT!!!



by:

It was nice to open the box and see all the part neatly packaged and by the look of the parts it looks like a good quality product.



by:

Not sure but I certainly think it makes a lot of difference otherwise there would be a lot of sagging



by:
2015 Ford F-150

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



by:

Easy to install. Performed install start to finish in about 1 hour.



by:

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.



by:
2019 Ford F-150

Easy to install. Ride is good with out a trailer. Etrailer was great fast shipping



by:
2020 Ford F-150

The service was great!



by:
2017 Ford F-150

good instructions and made a difference in towing trailer


25
426
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Ask the Experts about this RAS Vehicle Suspension



  • Correct Roadmaster Active Suspension Kit for 2018 Ford F-150
    There is a Roadmaster Active Suspension Kit that will work for your 2018 Ford F-150 but # RAS3611 is not a fit for your truck. The exact model number of Roadmaster Active Suspension Kit you want for your F-150 is going to be # RAS3611-B.
    view full answer...
  • Is Roadmaster Active Suspension Kit Needed In Addition to Weight Distribution
    The answer to your question will depend on how you use your truck. Vehicle-based systems like the Roadmaster Active Suspension system or air bags will work just fine with a weight distribution system, but they work best to suspend weight being hauled in the bed of a truck or in a vehicle's cargo area, while a weight distribution system does a better job of transferring a trailer's tongue weight from the rear tow vehicle axle to the front. If in addition to towing you also frequently carry...
    view full answer...
  • How to Eliminate Porpoising when Towing Trailer with 2018 Ford F-150
    I have a great solution to the porpoising and bounce you are experiencing when towing with your 2018 Ford F-150. I recommend taking a look at the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-Y if you have a 4WD or # RAS3611-B if you have the 2WD model. This will essentially convert your truck's leaf springs into a mechanically active suspension system. It will drastically improve the stability and control of your ride as well as eliminate that porpoising when...
    view full answer...
  • What is the Best Suspension Enhancement for My 2022 Ford F-150
    The suspension enhancement kit I recommend for your 2022 Ford F-150 is the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit. This kit will not add any extra payload capacity to your truck but it will improve suspension sag and will improve the quality of your ride, loaded or unloaded. Another great thing about the RAS is they are quicker and easier to install than air bags and do not require the maintenance that air bags do. If your F-150 is a 4-wheel drive you will need...
    view full answer...
  • Which Roadmaster Active Suspension System Should I Use On My 2019 Ford F-150 4x4?
    The correct kit that you want is Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-Y. The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B is made for the 2x4 version of your 2019 Ford F-150 so will not want to go with this kit. In regard to the parking brake, you will not have an issue with this Y kit interfering with your parking brake. I attached a helpful installation video that shows how easy the installation process is; just keep...
    view full answer...
  • Best Suspension Enhancement for 2012 Ford F-150 Towing Travel Trailer
    The Roadmaster Active Suspension kits like the # RAS3611-YHD that fits your 2012 Ford F-150 is the way to go. It gives you the support you are wanting to reduce the suspension sag and burden on your weight distribution system but also gives you an improved ride quality and stability unlike the other suspension enhancement options out there which is why I recommend it so highly.
    view full answer...
  • Correct Roadmaster Active Suspension Kit for 2020 Ford F-150
    For your 2020 Ford F-150 the correct Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit is part # RAS3611-Y if you have 4WD or # RAS3611-B if you have 2WD. Please just note that neither option will fit the Raptor models. This is a really great system that will do a nice job of leveling out your ride and increasing stability on the road, especially when hauling cargo or towing a trailer. It's going to secure under the factory leaf springs and around the U-bolts to essentially...
    view full answer...
  • Suspension Helper Springs to Reduce Sway on a 2020 Ford F-150
    The best suspension enhancement kit for your 2020 Ford F-150 that is going to help reduce body roll and sway as well as give your truck the added support it needs is the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit. The reason this kit is superior to the rest is because it is what is known as an "active" system, which means that it is constantly reinforcing your F-150's original leaf spring suspension. Because of where it installs (see accompanying photo) the force...
    view full answer...
    Image 1 for
  • 2020 Ford F-150 Suspension Upgrade to Help Reduce Sway
    Whenever you tow a trailer, or put a lot of weight on the rear of your F-150 the leaf springs start to flatten out, and typically the ride geta very stife. Not to mention the sag in the rear end. The back goes down, and the front raises up. Which leads to less traction on the front tires, reduced braking and porpoising. To help the sway and bounce when towing your trailer I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit. For 2WD # RAS3611-B, and for 4WD #...
    view full answer...
  • Leaf Spring Enhancement for a 2021 Ford F-150 4wd Towing a 7,400 lb. 5th Wheel
    Since your 2021 Ford F-150 is a 4wd you will want the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-Y, as this is the correct leaf spring enhancement for the 4wd models. This will be a great option for towing your 5th wheel. This all-in-one suspension system will improve stability, handling, and control while eliminating axle wrap, wheel hop, and bottoming out. It will also help to reduce dangerous sway and body roll while cornering and keeps your ride level...
    view full answer...
  • Recommended Roadmaster Active Suspension Kit for 2016 Ford F-150 4x4
    For your 2016 Ford F-150 I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-YHD. This kit will work well with your WDH while helping to get you back to level. By actively strengthening your leaf springs it will also assist in reducing sway and extend the life of other suspension components. I would choose the heavy duty version since it will do a better job of leveling the truck while making no real difference in unloaded ride quality...
    view full answer...
  • Is Roadmaster Active Suspension System Compatible Wtih 2021 Ford F-150 With Auto-Leveling Headlights
    I spoke with the folks at Roadmaster Active Suspension and was told that because the RAS system sits within the footprint of the leaf springs, it will not interfere with the sensors for the Auto Headlight feature, but you will need to move the adjustable cross-bolt from its spot at the end of the bracket to the second to last holes as shown in provided photo. We offer 3 different Roadmaster Active Suspension Kits for the 2021 Ford F-150. I'll list the fits below: • Part # RAS3611-YHD...
    view full answer...
    Image 1 for
  • Will Roadmaster Active Suspension Kit Help With Wheel Hop on 2016 Ford F-350
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-S is actually a great solution to eliminate the wheel hop you are experiencing. This system eliminates axle wrap, wheel hop, and bottoming out. The force that is causing the wheel hop will be absorbed by the RAS kit. In addition to solving your wheel hop problems, the RAS will also keep you level when towing or hauling while helping to reduce sway and body roll. It also helps to extend the life of your leaf springs,...
    view full answer...
  • How Much Will Roadmaster Active Suspension Leaf Spring Enhancement Kit Raise 2020 Ford F-150 Lariat
    My contact at Roadmaster was able to confirm that using either the white 25 disk or the black 40 disk when installing the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B will not raise your 2020 Ford F150 Lariat more than 1.5 inches. He mentioned that usually the increased lift is due to having leaf springs that are getting worn out and the leaf spring enhancement kit adding pressure back to them will add some lift. Since your truck is still pretty new he mentioned...
    view full answer...
  • Roadmaster Active Suspension Kit Recommendation for Reducing Sag on 2015 Ford F-150 when Towing
    Yes, the Roadmaster Active Suspension Kit # RAS3611-B for your 2015 Ford F-150 would be exactly what you would need to help eliminate the sag you are experiencing with your heavier trailer and it will also greatly reduce side to side sway. This kit also install very easily.
    view full answer...
  • Will The Roadmaster Leaf Spring Enhancement Kit Work on 2019 Ford F-150
    Yes, the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-B will certainly work on your 2019 Ford F-150. The Roadmaster leaf springs secure under the Ford's leaf springs and around the factory U-bolts to help support the leaf springs when towing a heavy load.
    view full answer...
  • Suspension Enhancement Recommendation for 2017 Ford F-150 Towing Trailer
    Sounds like you may be over the towing capacity of your 2017 Ford F-150 if air bags and a weight distribution system aren't cutting it for you. Before you proceed you should verify that you are within the capacities of the truck. For what you're looking for I would go with the Roadmaster Active Suspension kit # RAS3611-B. We had a guy come back with a truck just like yours who installed this kit and reported that it worked well on his truck with a weight distribution system. I attached...
    view full answer...
    Image 1 for
  • Correct Roadmaster Active Suspension Kit For A 2020 Ford F-150
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B will be the correct model. These are a popular choice to help improve your ride experience while towing as they help reduce sag as well as increase stability, handling, and control by improving traction and reducing sway. Included is a video resource that provides a nice overview for you as well.
    view full answer...
  • Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit For 2020 Ford F-150 2WD
    I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-B for your 2020 Ford F-150 (not a raptor) 2WD. The Roadmaster Active Suspension kit is a great option to strengthen the leaf springs on the truck when under a heavy load. The coil springs secure under the leaf spring and around the factory U-bolts and can be adjusted during setup depending on how heavy of a load you plan on hauling. I have attached a video for you to take a look at.
    view full answer...
  • Roadmaster Active Suspension Leaf Spring Enhancement on 2017 Ford F-150
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B will help with sway by isolating the side to side movement and giving stability to your truck reducing rear squat. When adding the suspension enhancement, I do recommend readjusting the weight distribution system as the height of your truck will likely change a little. When your truck is unloaded the factory suspension is all you will feel and the RAS will add support as weight is added to your truck bed or...
    view full answer...
  • What Leaf Spring Enhancement do You Recommend for 1,500 Pounds of Trailer Weight on a 2022 F-150?
    For towing a trailer with a tongue weight of 1,500 pounds on your 2022 Ford F-150, I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B. Not only will the Roadmaster enhancements give you a 2,000-pound load carrying capacity, it will also dramatically increase the overall life of your leaf springs. In addition, the kit will give you a smoother ride with or without a load. As far as fitment, the kit will fit both 2-wheel drive and 4-wheel drive models.
    view full answer...
  • What Rear Axle Suspension Enhancement Works Best For My 2018 Ford F-150
    When it comes to suspension enhancement for your 2018 Ford F-150 I recommend The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B. This system has a 2,000 pound capacity which will actively strengthen your vehicle's factory leaf springs into a mechanically active suspension system. It is an easy bolt-on installation. The unit secures under the leaf spring and around the factory U-bolts. The system helps extend the life of leaf springs, shock absorbers, shackles,...
    view full answer...
  • Which Roadmaster Active Suspension For 2018 Ford F-150 Towing 5000-lbs Trailer
    For towing a trailer that weighs 5000-lbs and has a tongue weight of 500-lbs, the standard duty Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-Y (4wd) or Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B (2wd) would be my recommendation. Going with the Heavy Duty application would likely create a bit stiffer suspension than needed and adversely effect your unloaded ride quality. I've linked some review videos of this spring system for...
    view full answer...
  • Which Roadmaster Active Suspension Kit for 2020 Ford F-150
    The correct Roadmaster Active Suspension (RAS) application will depend on whether you have a 4x2 or 4x4 truck and the amount of additional support you're needing. If you have a 4x2 truck, use # RAS3611-B for 2000 lbs of support or # RAS94FR for 3000 lbs. If you have a 4x4 truck, use RAS3611-Y for 2000 lb or # RAS3611-YHD for the 3000 lb kit. These will fit 2020 F-150 models with the exception of the Raptor. I've linked a video that explains how the RAS system works.
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Randy B
Installed by:
Randy B
Employee Mary E
Written by:
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