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3,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway.
Features:
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.
RoadActive 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.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer. Let's take a quick look together at this RoadActive Suspension Heavy-Duty Custom Leaf Spring Enhancement Kit. Now, this kit has been designed to fit your 2025 and newer Chevrolet Silverado and GMC Sierra 1500s, both the two-wheel and four-wheel-drive models. And on custom-fit parts, such as this kit, I do recommend taking advantage of our vehicle fit guide here at etrailer. Just input the year, make, and model of your vehicle, and answer any other questions that it might have for you.
And our fit guide will confirm if this kit will work for you or if we have something comparable that will work for you. Now, this is a heavy-duty suspension upgrade that's going to work with your truck's existing leaf springs rather than replacing them. This is going to turn your factory leaf springs into an active suspension system that's going to automatically respond to weight changes. So when you're towing or hauling something heavy, this system is going to immediately engage and help support that extra load. This is going to help keep your truck level, it's gonna help reduce squat, and it's gonna make everything feel more stable and controlled.
When you're unloaded, this backs off and lets your factory suspension behave normally so the ride doesn't feel stiff or harsh when you're just driving around empty. Now, one of the biggest benefits is how much this improves handling and safety. This is going to help eliminate that axle wrap, wheel hop, bottoming out, excessive sway, and body roll, especially when cornering or braking. You're gonna notice better traction when accelerating and braking, and your truck's just gonna feel more planted and predictable overall. Now, this system uses variable-rate coil tension springs that are gonna automatically adjust based on how much weight you're carrying.
During installation, these springs can be tuned to match your specific towing or hauling needs, and they're even adjustable side to side to help level uneven or off-center loads. So this is designed to help reduce wear and tear on other suspension components on your truck by helping the leaf springs do their job more efficiently. And it's also gonna help extend the life of your leaf springs, shocks, shackles, and even your tires. From a durability standpoint, this is built to last. The steel components are epoxy E-coated, and the brackets are corrosion resistant with a high salt spray rating, so it's gonna hold up well under harsh conditions.
Insulation's gonna be pretty straightforward and completely bolt-on, so no drilling, no cutting, no welding. And as you saw on that picture that I had up there before, this is going to mount under the leaf springs and around the factory U-bolts, and everything comes fully assembled with the required hardware. So the springs are gonna come just as you see them here. This is how I pulled 'em out of the box. You're also going to get these bump stop spacers, along with the hardware and instructions to guide you through the pretty simple installation process. One important thing to note, now, this system can support up to 3,000 pounds, and that's gonna help dramatically improve your ride quality, as we've been talking about, but this does not actually increase your truck's weight-carrying capacity. So because of that, you do wanna make sure that you're not exceeding your manufacturer's recommended weight limits. If you happen to have any other questions, whether it's about this kit or anything that we have here at etrailer, don't hesitate to reach out. We wanna make sure that you're getting exactly what you need. Well, again, my name is Andy. Thanks for joining me.
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