1. Vehicle Suspension
  2. RAS
  3. Leaf Springs
  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 # RAS4611
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Our Price: $469.00
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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 RAS4611 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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RAS Vehicle Suspension - RAS4611

  • 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.


  • 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


  • 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.

4611 RAS Custom Active Suspension System for OEM Leaf Springs - Rear Axle

Installation Details RAS4611 Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - RAS4611

Average Customer Rating:  4.7 out of 5 stars   (322 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.

- RAS4611
2011 Nissan Titan

The bed of the truck measured 37.5" with a tool box weighing 200 lbs. The truck felt weighed down with passengers weighing 600lbs. Total weight 800lbs with a tank full of gas. After the install the truck rides smoother and certainly " like new". The stopping distance and acceleration distance have shortened drastically. I'm planning on loading up the bed and the Roadmaster Active Suspension RAS4611. My wife even drive it and she could feel the difference. "It drives like a muscle car." Buy it. Install time at a reputable mechanic shop was a 30 min. Install. I received them today at 1 pm and got it installed at 3:00 pm and finished the install at 3:30pm. It's an investment worth the price over traditional air bag system. Mechanic installed this on 2011 Nissan Titan SV.

What can I say. After a year of constantly driving through Texas roads and highways. I have moved twice and loaded the bed of my truck plus U-Haul 6x12 trailer and thy truck has not felt the load of it. The Active Road Suspension Leaf Spring is constantly sort of speak sensing if theres load so it can actively push it upwards. I have even driven up to the crazy roads of Pennsylvania and my pick drives smoother than when I got it from the dealer. Im telling you these things work. As any cautious driver upkeeping his own vehicle, I have periodically checked the bolts and location of the resistance in between the spring and it has not deflected or moved from its original installation. I believe every pick up must have these. It beats constantly putting air on the air bags especially in inclement weather like up here in Pennsylvania with the snow. I couldnt be more satisfied with this purchase. Thank you etrailer for offering this superb product.
Sergio R - 08/13/2021

Just like when I bought it.
Sergio R - 08/16/2021

- RAS4611

I have a 2020 Silverado 1500 6 cyl Duramax with the Diesel Off Road package (3.73 diff). Travel trailer loaded is probably about 6,000 lb. I took several measurements during and after the spring kit installation. All measurements increased about an inch including the stock suspension with trailer and equalizer bars and with the spring kit installed at 1 mm spacing. A one inch improvement overall. I took the truck on a short drive and didn't notice any difference in ride (wasn't stiffer) which is what I wanted. Good to know that I can adjust the springs to the 2 mm spacing if I want to increase the suspension assist. Going camping next week and looking forward to see how it improves handling and porpoising.

- RAS4611
2008 Nissan Titan

I am on a Nissan titan 08. The roadmaster active suspension is really easy to install here for someone who has very little knowledge when it comes to stuff like this. I was able to do it on my own. I’ll write another review in a couple of months see how it works out here in the Coachella Valley California here we get to 123° weather sand storms so I’m gonna put it thru trials see how good it is.I own a landscaping company and I haul a lot of rock, and DG, boulders.

- RAS4611
2019 Chevrolet Silverado 1500

Helped my truck to hold the weight better, lees body roll and less rear bouncing. Did not change the ride when not loded and its very simple to install. Took me less then an hours to install them.

- RAS4611
Ram 2500

These helper springs were easy to install and adjust-approximately 25 minutes total. I pull a trailer that has a tongue weight of about 625 lbs. and these helped reduce the squat and sway of the back end of my GMC 2500 pickup. I feel like they did what they were supposed to do and am happy with them. I think the only draw back is that it does lift the bed of the pickup up a little bit when not attached to the trailer which makes climbing in the back a little more difficult but the trade off is worth it.

I am still happy with the product
Easy T - 03/30/2021

- RAS4611

Easy installation, haven’t driven it yet but it definitely helps the rear springs, re leveled my truck after installing a hd bed cover, raising it at least an inch or more

- RAS4611

This product is amazing. I tow a 30ft trailer with my 1/2 ton truck and added these to it for greater stability and control. While it did not completely eliminate all bouncing, it greatly increased the handling and makes the suspension much firmer than it was without them. Also when not towing, the performance of these really shines though! No more rolling sensation while cornering and these really enhance the off-road rally performance of my Chevy Silverado Z71. The added benefit over helper springs is that these adjust to your ride based on the load you are carrying... Heavier load=stiffer ride, lighter loads=better overall handling performance. Do note... If you are planning to use a 1/2 ton to tow heavy loads, addressing the suspension is only one part of the battle. You also need to consider adding a transmission cooler to ensure you don't overheat your engine. All in all, these were the first addition I made to my truck to improve its towing performance and increase my confidence hauling weight. The benefits were immediate and installation is easy enough for just about anyone with a little DIY tenacity.

- RAS4611
2007 Nissan Leaf

The RAS arrived on time and was super easy to install. It took my son and I about 45 minutes to install. It helps when you have all the right tools handy. The only thing I didn’t anticipate was the Allen wrench needed to reinstall the cross bolt in front of the leaf spring shackle. Fortunately, we had the right size on hand. So far so good. Haven’t had a chance to hook up to my RV yet. I’m optimistic it will take some stress off the leaf springs.

- RAS4611
2019 GMC Sierra 1500

I installed the Roadmaster Active Suspension Custom Leaf Spring Kit on my low milage 2019 GMC Sierra !500 (with the trailering package) to assist with pulling my travel trailer. etrailer delivered my package quickly and after watching their installation video the procedure was simple with no problems. I just returned from a trip and could not be more disappointed. The vehicle rode rough and bounced aggressively. I towed in 3 states primarily on interstate as well as some primary roads. I have previously towed this trailer with a 2016 Jeep Grand Cherokee and experienced a much better ride. I expected as much on my pickup. The ride without towing my trailer is markedly more "bouncy" as well. I have tried both settings with the same results. These will be taken off ASAP!

- RAS4611
2019 Nissan Leaf

Could pack box a little stronger, instructions could be a bit more in depth. Product is great, seems to work well. For the price I’d be curious about other suspension helpers. Will be loading it up next week and I feel confident in the aide this gives to my leaf springs.

- RAS4611

Great service as always from etrailer.com! Item was easily installed by myself in 45 minutes. The improvement in handling exceeded my expectations and sway has been eliminated. I have recommended it to several others.

- RAS4611

Helped dramatically with both sag and sway when loaded with 26’ ATC toyhauler trailer >1000lbs tongue weight and 8000lb overall. Installed on 2020 GMC AT4 15000. On lower setting I think it rides better than stock and prevents wheel hop/axle wrap on Oklahoma pot holes and washboard. Very impressed. Doesn’t have the adjustability of airbags but for the price and ease of install + performance I would buy again

- RAS4611
Nissan Titan

Great fit and really stiffened up my rear suspension on my 2020 Titan Pro4x and also lifted about 1.5 inches. I will be towing a 33ft toy hauler with a weight distribution hitch with dual anti sway bars.

- RAS4611

Fast shipping, easy to install, works g reat!

- RAS4611

I'm an older do-it-yourselfer and this kit was a breeze to install. The fit and finish were flawless. I took the vehicle for a test drive (not towing or hauling anything) and could notice an immediate improvement with how it handled bumps, dips due to road-slippage repairs, and when cornering. The rear of the vehicle was raised just a tad, but not so much that it looked or felt unusual. I feel very good about this purchase (value and quality) and the money spent for the achievement of desired effects. Bought it primarily for towing an RV, to reduce sag and increase handling abilities.

- RAS4611

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.

- RAS4611
2017 Nissan Titan

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.

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

- RAS4611

So easy to install! Took longer to set truck up and remove the wheels! Took a test drive and truck handles with less sway while cornering. Have not towed my 6500 # travel trailer as of yet.

- RAS4611
2011 Chevrolet Silverado

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.

- RAS4611
2015 Chevrolet Silverado 1500

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

The product working beautifully , it dose everything it said it would do. Just came back from a trip to Northern Michigan the my pull behind trailer 28ft on a lot of less then perfect roads and construction the Roadmaster Active Suspension definitely made the travel more comfortable
Robert F - 08/22/2020

- RAS4611

awesome product, silverados with the locking rear differential have a bad trait of severe wheel hop on slick roads or in snow, it is bad enough that it feels like the truck will come apart, this product said it eliminates wheel hop.... it does. no more hop in the snow and some nice added hauling capacity for my trailer towing.

- RAS4611

I felt with Dawn , she did everything to get me my road master active suspension as soon as possible , she was one of the best person that I've ever felt with , placing an order ,

- RAS4611
2008 Acura MDX

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

- RAS4611

I have had these for about a year installed at just a bit tighter than 1mm. I was very skeptical of their claim that they improve the unloaded ride quality, but it really was true. The best way I can describe it is that now the front and rear suspension feels about the same when I hit a bump.... right up until you cause enough travel to include the leaf springs. Then it gets stiff really quickly. This works because when you install the RAS springs, they pull the ends of the leaf pack together almost like the rear suspension is drooping. This creates a bit of suspension travel that is only controlled by the leaf springs on the RAS. The RAS springs are softer than the leaf pack and as long as the bump doesn't exceed that range, the ride is very compliant. I really like it. Ride improvement asside, I actually got this for towing my camper. I had a lot of up/down oscillations at the tongue when fully loaded on the highway. The RAS kit did help but hasn't eliminated it. At the Tampa RV show I spoke to the guy at the booth and he suggested I tighten the springs some more. I will do that before my next trip. I'm curious if that hurts the improved ride quality I have. I've also been told to add better equalizers or shocks to the trailer. I occasionally hear some creaking from them when getting in or out of the truck or when loading the bed. It's nothing I'd ding the rating for, but they're not silent. I never hear anything from them while driving. I live on a dirt road and so far, I've not noticed that cause any issues. Overall, I'm very happy with the product. I always thought the rear suspension was a little jarring unloaded and this smoothed that out while helping my suspension control heavy loads too. It really is the best of both worlds. I'm sure I'll put them on my next truck. 2015 Silverado Z-71 Equalizer 1k/10k WDH 2019 Grand Design Imagine 2600RB

- RAS4611

The best suspension product choice ever! Works as stated. Towing my dual axle, fully loaded trailer (to full really) my truck is level & it’s very easy to pull. Great product

Show More Reviews

Ask the Experts about this RAS Vehicle Suspension

  • How To Decide Between Standard and HD Roadmaster RAS Leaf Spring Kit for 2018 Chevy Silverado 1500
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit is an excellent option to provide additional load-leveling support and it will work just fine with an existing weight distribution system. The correct kit for a 2018 Chevrolet Silverado 1500 is part # RAS4611 for standard or part # RAS54FR for heavy duty. The standard would be fine for this application but you could go with the upgraded heavy duty option if you felt the need. Please note, we actually don't carry the...
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  • Recommended Suspension Enhancement For 2020 Chevy Silverado 1500 Towing Fifth Wheel Trailer
    There are air bags that are compatible with the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit part # BWGNRK1019-5W and part # BWRVK3500-5W for the 2020 Chevy Silverado 1500! I recommend the Firestone Ride-Rite Air Helper Springs part # F2609 because they are compatible with an in-bed hitch without drilling compared to some of the other air bag brands that require drilling through the brackets of your hitch to install the bags. These bags install in a different...
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  • Best 2020 GMC Sierra 1500 Rear Suspension Enhancement
    THe Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 that you looked at is a good option. It will not completely remove the sag but it does help. It also makes an improvement to the unloaded ride quality. Less body roll and and more responsive steering are great side benefits of them. Another option is the Firestone Ride-Rite Air Helper Springs part # F2609 these will allow you direct control for 100 percent level ride. Of the two I recommend the Airbags....
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  • Recommended Rear Suspension Enhancement To Eliminate Bouncing On a 2019 GMC Sierra 1500 AT4
    I recommend the Firestone Ride-Rite Air Helper Springs # F2609 for your 2019 GMC Sierra 1500 AT4. As your Sierra will have a 2" factory lift with the AT4 package you will need the Lift Spacers # F2366. The air bags will help to reduce the bounce that you are experiencing when you tow with your toy hauler by absorbing the shock and dampening the suspension. The Air Lift WirelessAIR Compressor System # AL74000EZ is the compressor that I recommend. You can adjust your suspension on the...
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  • Transmission Cooler and Rear Suspension Helper Springs for 2012 GMC Yukon XL
    Let me begin by saying that the towing capacity can't be increased beyond the limits mentioned in the owner's manual that are dependent upon how the vehicle is equipped. In the manual, it states that models equipped with the HD cooling package have an increased capacity up to 8100 lbs for 5.3L equipped 2WD or 8000 lbs for 5.3L equipped 4WD models. After looking through the online forums, it seems that the HD cooling package consisted of a transmission cooler, the hitch and the trailer...
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  • Which Roadmaster Active Suspension System for 2021 Chevy Silverado 3500 Dually
    I can absolutely understand not wanting to mess with some of the maintenance/complications of use of air bag systems for your truck! Roadmaster Active Suspension does have a kit available for the 2021 Chevy Silverado 3500 dually with the # RAS3611-CHD. This particular model is designed to work on dually trucks, so it's exactly what you're looking for. I've linked a short review video about this suspension enhancement for you to check out as well.
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  • Roadmaster Active Suspension Enhancement for 2004 GMC Denali with Quadrasteer
    I have an option for you, but the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 is not compatible with the Quadrasteer system on your 2004 GMC Sierra Denali. Your best bet and the only confirmed suspension enhancement solution that won't interfere with your Quadrasteer components, is the Timbren Rear Suspension Enhancement System # TGMRCK25S. These hollow rubber springs sit above the rear axle to help stabilize and level your Sierra.
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  • Will Roadmaster Active Suspension Kit for 2021 Chevy Silverado 1500 Level Truck When Towing
    Yes the Roadmaster Active Suspension kit part # RAS4611 that fits your 2021 Chevy Silverado 1500 will do exactly what you are looking for and will level your Silverado's suspension with it's adjustable support. It also will improve ride quality and handling over the other options as well.
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  • Recommended Suspension Enhancement To Prevent Sway On 2005 Toyota Tundra
    For your 2005 Toyota Tundra 4WD I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 as they will offer more stability with a pop camper or when towing a boat trailer, but also when your truck is unloaded. The # RAS4611 have a 2000lb load leveling capacity that can be fine tuned to your specific truck and will not require any drilling. Air helper springs do help some with sway, but are more designed for preventing sag. The great part about the # RAS4611...
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  • Will Roadmaster Active Suspension Change Ride Height on 2021 Sierra 1500 With 2 Inch Factory Lift
    The # RAS4611 Roadmaster Active Suspension Kit is a confirmed fit for your 2021 GMC Sierra 1500 AT4. This works with your factory 2 inch lift. I recommend this suspension enhancement kit These springs are customizable and may be adjusted during installation. They also automatically adjust to your vehicle's load. They only down side here is they may increase the height of your vehicle which is what you have asked to avoid. According to Roadmaster, most vehicles fall into the range of...
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  • Best Adjustable Suspension Enhancement For 2015 Chevrolet Silverado 1500
    The SumoSprings Solo Custom Helper Springs # SS45MR don't have any adjustments on them unlike the Roadmaster Active Suspension Enhancement Kit # RAS4611 does. I would go for the Roadmaster if it were me. Both of these will fit your 2015 Chevrolet Silverado 1500. For the best unloaded ride quality, the Sumo Springs would be best as they aren't activated until your suspension sags enough to make contact. The Roadmaster option will always be engaged.
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  • Recommend Suspension Enhancement for a 2020 Chevrolet Silverado 1500
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit, part # RAS4611, is a great choice for your 2020 Chevrolet Silverado 1500 and is the one I recommend. It turns your leaf springs into a mechanically active suspension system to give you a better ride quality with or without a load. It definitely helps with the sag problem. They're adjustable, putting them a step above SumoSprings, yet they adjust automatically, putting them above the air springs. They have a 2000-lb...
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  • Suspension Enhancement for 2017 Sierra 1500 that Bounces When Towing
    The best solution to prevent the bounce and improve the ride quality when towing with your 2017 GMC Sierra 1500 will be with a Roadmaster Active Suspension kit # RAS4611. Unlike other suspension kits this gives you the support you are wanting without sacrificing ride quality. Most report back that their ride quality actually improved which is unlike any other option.
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  • Can Roadmaster Active Suspension Work With Air Bags On My 2014 Nissan Titan?
    The Roadmaster Active Suspension Kit # RAS4611 will not work with either the Firestone Ride-Rite Air Helper Springs # F2355 or Air Lift Ride Control # AL59554 on your 2014 Nissan Titan. All the kits involve a mount placed at the U-bolts of the leaf springs to attach the necessary hardware on your Titan. If you are using an in bed hitch the Roadmaster is the only kit that will accommodate that hitch on your Titan. The air bags from Firestone and Air Lift will allow for more dialed...
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  • Setting Advice When Setting Up Roadmaster Active Suspension Kit RAS4611 on Silverado
    You'll have to experiment with the settings of the # RAS4611 to find what works best to level your trailer. I can't give you an exact setting to use but I would try increasing the settings until you reach the desired level of reduced sag.
    view full answer...
  • Correct Setting for Roadmaster Active Suspension On 2020 GMC Sierra 1500
    The correct Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit for a 2020 GMC Sierra 1500 is part # RAS4611. In regards to installation, you can set the spring tension to 25% additional load carrying capacity or 40%. I recommend starting with 25% tension and if this is not enough work your way up 40%.
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  • Roadmaster Active Suspension System for 2019 GMC Sierra 1500 Denali
    You were looking at the correct part; the Roadmaster Active Suspension # RAS4611 is a confirmed fit on your 2019 GMC Sierra 1500 Denali. The RAS system helps turn your leaf spring into a mechanically active suspension system that will help level variable payloads and create more stability in your ride. I've linked a great video of these that helps show how they work.
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  • Will The Roadmaster Active Suspension RAS4611 Fit a 2019 GMC Sierra With a Factory Ride Hight Sensor
    I spoke to one of the Techs over at Roadmaster Active Suspension and the Leaf Spring Enhancement Kit # RAS4611 should fit without issues. He mentioned the sensor in question being on a bracket that sits over the leaf springs higher than these will sit. I included an install we did with these on a 2013 Silverado as well. This one doesn't have the ride height sensor, but will show exactly where the # RAS4611 will sit on the springs.
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  • Best Suspension Enhancement for 2020 GMC Sierra 1500 4WD That Won't Affect Normal Ride
    The best suspension enhancement for your 2020 GMC Sierra 1500 that will not affect your normal ride is the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611. The Roadmaster Active Suspension (RAS) is the best for your truck because it is an active system which works to continually reinforce your original leaf spring suspension. The force normally put on your Sierra's leaf springs, particularly when towing, gets transferred to the RAS Enhancement Kit, allowing...
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  • Will Roadmaster Active Suspension for 2017 Chevy Silverado 1500 Damage U-Bolts
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 will in no way damage the U-bolts of your 2017 Chevy Silverado 1500. If you take a look at the accompanying photo of this kit on a Silverado you can see how it installs to the side of the U-bolts. You are making a very intelligent choice with this kit because it is the best way to enhance the suspension for your truck. The reason for that is because the RAS is an active system which works to continually reinforce...
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  • Comparing Roadmaster Active Suspension and SuperSprings for 2019 GMC Sierra 1500 Towing
    The RAS systems like # RAS4611 are widely considered to be the best suspension enhancement you can install on a truck towing a trailer. They provide the most stability, provide the most comfortable ride quality, and are adjustable in how much support they provide unlike the SuperSpring kit you mentioned.
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  • Is The Roadmaster Leaf Spring Enhancement Compatible With The 2020 Silverado Trail Boss Edition
    Yes, the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit Item # RAS4611 is compatible with the 2020 Chevrolet Silverado Trail Boss Edition as long as it is the Silverado 1500.
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  • Maintenance Free Suspension Enhancement for 2019 GMC Sierra Denali Hauling Cargo or Towing Trailers
    For your 2019 GMC Sierra 1500 I think the perfect solution is with the Roadmaster Active Suspension Enhancement Kit # RAS4611, which fits whether you have the 2WD or 4WD. This is a "set it and forget it" type system that secures under the factory leaf spring and around the existing U-bolts to essentially convert it into a mechanically active suspension system. This just means the leaf springs are strengthened as soon as it's installed, and you don't have to wait for a load or hooked...
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  • Can I Use Roadmaster Active Suspension With A Weight Distribution System
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 will work well with the weight distribution hitch. If you are experiencing vehicle sag, I recommend to first make sure the tongue weight of the trailer is 10-15% of the loaded weight of the trailer. You also want to make sure your weight distribution head and spring bars are set up correctly with the right amount of tension. Any weight behind the rear axle of the Titan plus the loaded tongue weight of the...
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  • Owner Maintenance Required For Roadmaster Active Suspension On 2021 Chevrolet Silverado 1500
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 will require no lubrication as regular maintenance on your 2021 Chevrolet Silverado 1500. It is important to check the components for any road debris that might collect in the assembly. You will want to ensure that you keep excessive dirt from building up on the moving components and regularly inspect the spring for the proper adjustment. As the suspension on your Silverado begins to sag the Roadmaster will...
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  • Rear Suspension Enhancement for 2018 Nissan Titan with Truck Camper Towing Boat Trailer
    For your application with a combination of truck camper and trailer towing the Roadmaster Active Suspension for the 2018 Titan # RAS4611 is the best product option. This kit will support your leaf spring suspension, adjusting automatically to the specific load at any given time. It will reduce sway and level the ride. The RAS gives up to 2000-lbs of load support so it will be ideal for your combination of camper weight and trailer tongue weight. An installation video is linked for you.
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  • Will Installing Roadmaster Active Suspension Enhancement Kit Void 2019 GMC Sierra Warranty
    Installing the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 on your 2019 GMC Sierra 1500 will not void the manufacturer's warranty. Consumers are actually protected from this very concern under the Federal Magnusson-Moss Warranty Act, which essentially states that a manufacturer's warranty can't be voided from the simple act of installing an aftermarket product like this suspension kit. The Roadmaster Suspension System is only going to help the factory...
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  • Will Roadmaster Active Suspension Benefit 2018 Chevy Silverado 1500 Z71
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 will definitely have a positive impact on the suspension of your 2018 Chevy Silverado 1500 Z71. This kit is different than other suspension enhancements in that it is designed to be active, as its name suggests. What this means is that the system is continually reinforcing your Chevy's leaf springs. As you can see by the accompanying photo the RAS Enhancement Kit installs under your leaf spring which allows...
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  • Can Roadmaster Active Suspension Kit and Timbren Kit be Used at Same Time
    If you were in a situation where you needed more support than what the Roadmaster Active Suspension kit # RAS4611 could provide and were thinking about also adding a Timbren kit you are probably overloading the suspension of your tow vehicle. The two kits will physically fit at the same time on a vehicle but the ride quality would be really rough. I'd go with just the # RAS4611 and if more support is needed I'd try adjusting the RAS so that more support is provided.
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  • Solution for Porpoising with 2015 Chevy Silverado Towing Rockwood Camper with WD System
    If you are still experiencing a lot of up and down porpoising with your Rockwood Trailer I first just recommend making sure that your weight distribution is rated properly for your setup. You will want to make sure that your total tongue weight, which consists of the trailer's loaded tongue weight along with any added cargo weight coming from behind the rear axle of your Silverado, falls somewhere within the range of your weight distribution system's tongue weight capacity. An under or...
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