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  1. Vehicle Suspension
  2. RAS
  3. Leaf Springs and Helper Springs
  4. Towing/Load Leveling
  5. Standard Duty
  6. Rear Axle Suspension Enhancement
THIS ITEM IS NOT A FIT FOR
2015 Jeep Compass
RAS

RoadActive Suspension Custom Leaf Spring Enhancement Kit

Part Number: RAS4511-T
In Stock
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$539.00
Vehicle Suspension
Not Confirmed to Fit

2015 Jeep Compass

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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. Great Prices for the best vehicle suspension from RAS. RoadActive Suspension Custom Leaf Spring Enhancement Kit part number RAS4511-T can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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RAS Vehicle Suspension - RAS4511-T

  • Leaf Springs and Helper Springs
  • Towing/Load Leveling
  • RAS
  • Standard Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only
  • Helper Springs

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 to your vehicle during installation to accommodate your towing or hauling needs
  • 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 on top of the leaf spring and under the U-bolt plate
    • 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
    • RoadActive 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.


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.


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

RAS is also customizable to your vehicle. During installation, the coil tension springs can be adjusted for improved road handling and support.


Easy, Bolt-On Installation

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, the axle bracket secures on top of the leaf spring and under the factory U-bolt plate. Then, position the eye hook bracket so that it wraps around the top of the factory leaf spring eye. 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.



4511-T RAS Custom Active Suspension System for OEM Leaf Springs - Rear Axle

Installation Details RAS4511-T Installation instructions

This Product Fits The Following Vehicles




Video of RoadActive Suspension Custom Leaf Spring Enhancement Kit

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




Video Transcript for An In-Depth Look at the RoadActive Suspension Custom Leaf Spring Enhancement Kit-RAS4511-T

Hi, everybody. Andy here with etrailer.com. And today we're gonna take a look at the Roadmaster Active Suspension custom leaf spring enhancement kit. Now this is a custom fit part, and it is designed to fit the 1986 to 1995 Toyota pickups, the 1995 to 1997 Toyota Tacoma, and the 1998 to 2004 Toyota Tacoma excluding the pre-runner. Now to confirm if these are going to work for your vehicle, take advantage of our vehicle fit guide and input the year, make, and model of your vehicle and our fit guide will let you know if these will work for your vehicle. Now 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're 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.

Now this kit will convert your vehicle's factory leaf springs into a mechanically active suspension system. It'll actively strengthen the leaf springs for improved ride quality with or without a load. And this all in one suspension system will improve stability, handling, and control. It will eliminate axle wrap, wheel hop, and bottoming out, and it will reduce dangerous sway and body roll when you're cornering. And it will even keep your ride level when you're towing or hauling a heavy load, improving your traction while breaking and accelerating.

It does use these variable rated coil tension springs, which will automatically adjust your vehicle's load. They activate immediately to support the extra weight, and they'll disengage when unloaded, allowing your leaf springs to perform as intended. They can be adjusted during installation to accommodate your towing or hauling needs, and they're independently adjustable for side to side leveling of any off center loads. These will help extend the life of your leaf springs, your shock absorbers, and your shackles, and even your tires. They are made in the USA and are constructed of a durable epoxy coated steel.

And the corrosion resistant brackets on the ends of each of these units have a salt spray rating of more than 800 hours. This is an easy bolt on installation so there's no drilling, no cutting, or welding required. This I bracket will wrap around the top of the factory leaf spring eye, and then the unit will secure under the leaf spring and around the factory U bolts. They arrive as you see them. Fully assembled, and the hardware is included. And these are maintenance free. Adjustments and monitoring aren't needed once they're installed. The weight capacity is 2,000 pounds. However, it is important to note that this kit will not increase your vehicle's weight carrying capacity. Well, that's gonna conclude our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me..

Ratings & Reviews

4.7

505 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.

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See what our Experts say about this RAS Vehicle Suspension

  • Is There An Air Bag Kit Available For A 1990 Toyota Pickup 4x4 With The Extended Cab
    Though I do have an alternate option, with your 1990 Toyota Pickup having the extended cab, there will not be an air bag kit available, unfortunately. With that being said, the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS4511-T will give you up to 2,000 pounds of load leveling capacity and will require no drilling to get installed. It is also removable when not needed, but will require the back of the vehicle to be jacked up by the frame to accomplish. This will be the...
    view full answer...
  • Does The RAS Suspension System Affect Ride Quality Of A Tacoma When Not Towing
    The RAS Suspension Systems essentially preload your leaf springs making them stiffer to prevent sag. This will affect your unloaded ride quality but not as negatively as some other compatible suspension enhancements for your Tacoma. These systems are super easy to adjust tension on so you could always lower the tension when unloaded if you weren't happy with the ride quality and then add more tension when it's time to haul. If you have a 2WD Tacoma then you'll want the RoadActive Suspension...
    view full answer...
  • Correct RoadActive Suspension Custom Leaf Spring Enhancement Kit for a 2004 Toyota Tacoma
    The correct RoadActive Suspension Custom Leaf Spring Enhancement Kit for a 2004 Toyota Tacoma is part # RAS4511-T for four wheel drive models or part # RAS4521-ST for two wheel drive models. The spring will do a great job of helping the truck handle extra weight from towing or hauling. It features a bolt-on install attaching to the leaf springs. It's made in the USA and has a five year warranty. Please note, the 4Runner uses rear coil springs so there is no way to use these on the vehicle.
    view full answer...
  • Recommended Bug And Rain Deflectors For A 2003 Toyota Tacoma Double Cab
    The RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS4511-T are stiffening your leaf springs and would help whether you were loading the bed with equipment or hauling a trailer. Either way it's a downward force on the bed and suspension (your leaf springs) so any sort of enhancement to help stiffen up the suspension will allow you to handle the load better. The stiffer you go though the worse your unloaded ride quality will be. For rain deflectors we offer the WeatherTech...
    view full answer...

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Info for this part was:

Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Andy C
Installed by:
Andy C

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