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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.
Features:
Specs:
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.
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.
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.
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.
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.
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.
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.
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.
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.
Average Customer Rating: 4.7 out of 5 stars (263 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.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.
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.
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.
Easy T - 03/30/2021The 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.
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.
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!
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
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.
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.
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.
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.
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.
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
Robert F - 08/22/2020I 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 ,
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.
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.
Bill - 06/29/2019I 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
I haven't had a chance to really test these out yet, but do far they are as reviewed. Still comfortable ride in my 2004 Toyota Tundra limited Double Cab. Will update once I get my trailer. Fast shipping, good condition when received. A+++
I will install this kit tomorrow. Can’t wait to see how my camper handles with this kit installed. Thank you so much! FC Cooley
This is the most simple and effective accessory I have used to simplify pulling my Travel Trailer.
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
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.
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
Works well. I haul a light travel trailer and also a trailer. Helps, very useful
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