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  1. Vehicle Suspension
  2. RAS
  3. Leaf Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
RoadActive Suspension Custom Leaf Spring Enhancement Kit

RoadActive Suspension Custom Leaf Spring Enhancement Kit

Item # RAS4524-SAT
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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. RoadActive Suspension Custom Leaf Spring Enhancement Kit part number RAS4524-SAT can be ordered online at etrailer.com or call 1-800-496-5010 for expert service.
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RAS Vehicle Suspension - RAS4524-SAT

  • 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
    • 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.


Diagram of RAS Installed

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

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.



4624-SAT RAS Custom Active Suspension System for OEM Leaf Springs - Rear Axle

Replaces 4524-SAT

Installation Details RAS4524-SAT Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

RoadActive Suspension Custom Leaf Spring Enhancement Kit - RAS4524-SAT

Average Customer Rating:  4.7 out of 5 stars   (499 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:

Improved the ride more than expected, lifted the back a couple inches. It was squirrelly to drive before now its a hoot.




by:
2010 Toyota Tacoma

I purchased a RAS vehicle suspension kit for my 2010 Tacoma to assist with load distribution when towing a trailer. The installation was easy thanks to etrailer’s how to video. They augmented my truck’s springs so the bed didn’t “squat “ with a trailer attached to the hitch.

A pleasant unexpected bonus of this kit was a GREATLY improved ride WITHOUT a trailer attached. It has smoothed out my ordinary ride on all types of road surfaces.




by:

Review from a similar RAS in Vehicle Suspension


I love the product since i have a 2021 toyota tacoma crew cab long bed with a campertop a robber mat and a jack thats around 450 pounds that a have at all times my truck was sittind low a lilbit plus it was swagging on the road i have summo spring to help my suspention but it was not enoght so i did my research but this was my better option i just installed it yerterday july-8-2021 and went for a ride where i ussually drive everyday and WOW now my truck rides very smood plus it lift my tryck 1 inch on the back now my tryck seats level it took me about 2 hrs but i did right i just follow the intructions and done i love the product the only thing that im concern is that the left side underneat the springleaft there is a breik line that is too close to the roadmaster suspention i hope that with the time dont hit that line because if it does thats the line for the breiks and i will be in trouble replacing it other wise evreything works great i recomend it 100% thanks guys i will buy it again?????best $500 that i spend on my truck


Comments
Its been working very well i loaded a couple of times and its awesome
Miguel - 07/10/2022


by:

Review from a similar RAS in Vehicle Suspension


Total transformation! I never knew how bad my ride was until I installed these RoadMaster 3611-HD active suspension. It took longer to safely jack my truck up and remove tires than it was to install them! Absolutely a game changer. I carry about 1000 lbs of tools and supplies daily and like riding a Rollercoaster when hitting bumps. Now, i hit bumps on purpose just to feel these RoadMasters work their magic! Love them!


Comments
After a year of use , these RoadMaster 3611-HD active suspensions are still the best addition to my trucks performance. The streets of Houston are brutal and these active suspension breeze through them. I have 354000 on this truck and if I ever get another, this Active Suspension will be the first addition. Hands down!
Tracey T - 04/29/2022


by:

Review from a similar RAS in Vehicle Suspension


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.


Comments
After a year I am still pleased with this product. I had been adjusting the spring tension higher when towing and then back down after a trailering trip, but now just leave it adjusted to the trailer towing tension as the unloaded ride doesnt seem to suffer when the springs are tighter.
Rick M - 03/27/2022


by:

Review from a similar RAS in Vehicle Suspension


Overall, very happy with the product. GMC didn't have any way to improve the truck from squatting when I hooked up my trailer. This kit didn't stop the squatting but significantly reduced the bounce on bad dips in roads, bridge/road transitions and bad railroad crossings.




by:

Review from a similar RAS in Vehicle Suspension


Roadmaster active suspension seems to be built very well. I look forward to towing my travel trailer very soon to see if it improves the towing experience.


Comments
It has been a year now since I installed the Roadmaster Active Suspension system on my 2018 F150. We pull a 30 ft travel trailer from Wisconsin to Alabama.Last year the roads became very slippery when we encountered a rain snow mix. The truck and trailer tracked perfectly. I just hooked up the rig yesterday to take the same trip, leaving tomorrow. The truck definitely handles better with the RAS. Im glad I installed it and am sure it will last for years.
Dave H - 01/30/2022


by:

Review from a similar RAS in Vehicle Suspension


Admitedly, I haven't even rolled my '07 Silverado 2500HD classic out of the garage yet, but I'm already very pleased. I had to go to a neighbor for a 10mm hex key socket and was slowed down by my 7yo kid 'helping', but it was still only 90 minutes my jack stands were in use. Easiest thing to do!
My only small downsides so far:
* needed to find a 10mm hex key that I apparently don't own, not sure why they picked that fastener
* wish I put some loc-tite on; just to make me feel better
* distance to drop the axle so the suspension fully hangs was way further than I expected; barely had my jack stands tall enough to get the job done.

These aren't really bad on the product, just notes for future customers. We're towing the 5er about an hour an a half this coming week, hopefully it steadies up a lot!




by:

Review from a similar RAS in Vehicle Suspension


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.


Comments
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


by:

Review from a similar RAS in Vehicle Suspension


Good service. Fast shipping an very easy installation. Can tell alittle difference already. Haven't hooked up to anything yet but always have a good bit in the bed 85 gallons of diesel an 2 full toolboxes




by:

Review from a similar RAS in Vehicle Suspension


Haven’t got to tow with them on yet. But overall they look and feel like they are great quality and were extremely easy to install. I had one slight hiccup and had to call customer support. I was on the phone and connected to an actually person within a minute, great customer service.
Without a load, my 98 Blazer rides very smooth, only slightly stiffer than stock. Also raised the rear maybe an inch, but not a big deal.




by:

Review from a similar RAS in Vehicle Suspension


This is my 2nd set of RAS! Just purchased for towing in my D-Max 2500HD. 1st set we’re on a Chevy 1500. I tow a 7000lb 259FKDS Freedom Express bumper pull and having the RAS-HD’s installed is night and day difference in towing. I have them set at 40% because of my cargo in the truck bed and tongue weight. I’m set up right now as I type on a 100 mile camping trip to set the springs and readjust if needed! So I say….”if you need support with towing, give RAS3611-HD a try…you won’t be disappointed with the results”




by:

Review from a similar RAS in Vehicle Suspension


Installed this on my 2020 GMC 1500 Denali. The one thing I hated about my Denali was how much a small amount of weight made it squat. The Denali is meant for smooth ride not towing! These springs brought the back of my truck up by an inch. Truck doesn't squat when being "exuberant" leavin red lights. Ride quality when empty hasn't changed. These springs are AMAZING but, are not a cure for all your hauling needs! When I'm hauling my 1800lb side x side on my trailer they work great! Hauling my 4500lb tractor... Load stabilizer hitch still recommended!




by:

Review from a similar RAS in Vehicle Suspension


The Roadmaster suspension kit did provide the additional stability and load carrying capability for towing a 6000lb rv travel trailer with a 2018 GMC Sierra 1500 Denali with Magnetic Ride Control system. However without the load the ride was rough and raised the rear of the vehicle so that night time driving with dim lights was reduced. The suspension kit was easy enough to remove during the off season of RV use, however is an inconvenience. It would be great to have Roadmaster create a system that would work with the Magnetic ride system without having to install / remove for the use and still continue to have a OEM smooth ride.


Comments
I reached out to the manufacturer about the rough ride that you have experienced. They did have a suggestion to make. It seems like that the system is adjusted to the 2 mm on the black shim. You can reduce the tension to 1-1.5 mm gap between the coils then it will help achieve a softer ride. You will want to raise the rear of the truck in the air and then leave the axle handing free. Using a dime as a gauge to redusce the gap between the coil springs. The adjustment can be done, with only one side in the air at a time.
-- Etrailer Expert Jenny N - 04/15/2022


by:

Review from a similar RAS in Vehicle Suspension


Night and day difference on our 2011 F150. Before installing the vehicle was almost undrivable at highway speeds due to bouncing/jerking when pulling our trailer. The bounce/jerk has been virtually eliminated since installing the Active Suspension. Installation was a breeze, hardest part was getting the wheels off the truck due to corrosion between the wheel and the rotors. Total install time was roughly 1hr 15 minutes including the stubborn wheels. Initially I was hesitant to order due to the price, but very happy with the results, etrailer also did a great job at guiding me through the process, shipping and answering a few technical questions along the way. Highly recommend if you need a little more spring/payload.




by:

Review from a similar RAS in Vehicle Suspension


Easy install 2011 Tacoma crewcab long bed. Helped with sag when towing microlite travel trailer. Keeps the rear end raised in the rear a little when unloaded, but I like that look. Only complaint and its nothing big when truck is unhooked and empty when i get out I can hear alittle noise from RAS. Sort of like a bedspring coil. Night pic is with RAS installed daylight pic is with out installed


Comments
Still working great. Towed a Flaggstaff microlite 23LB Travel trailer prob between 5 and 5500 LB’s to Niagra Falls with no problems, truck sat level with trailer and 2 adults,2kids. Getting ready to make a 2,000 mile round trip to disney in florida in a few weeks.
Rich - 03/10/2021


by:

Review from a similar RAS in Vehicle Suspension


Silverado 2500HD
Ready to install out
of the box. Simply extend the RAS out to become the proper length (shortened for shipping), remove the bolt to allow the fork to drop over the leaf spring and reconnect, hand tighten the assembly via turning the spring and check the "centered alignment", then tighten with a wrench (my socket wouldn't quite fit) until gap disc slips freely between the expanded spring. Took me longer to prep truck on a jack and two axle stands/remove tires for improved accessibility than the actual RAS installations.

Added 1 inch of lift "empty weight". Will see how much squat is removed under load of our travel trailer this weekend!

I'm not very mechanically inclined, and found this very easy to self-install - a level 1 project.

NOTE: etrailer customer service also took their time w/ me over the phone to ensure I had ordered the proper kit for my vehicle, and although my order was sent to the vendor for direct shipment, I got it to Alaska in less than 10 days.




by:

Review from a similar RAS in Vehicle Suspension


I found this items cheaper on another site but etrailer match and then beat the price.
Item installed super easy, more work jacking up the truck and taking the tires off. Can be installed with out removing tires just make it easier to get it in. The item did lift the back of my truck 1 inch. See Pics.


Comments
Makes the ride a little stiffer but its a truck. Great when pulling my 37 camper. Helps out a lot!!!!
William - 03/30/2021


by:

Review from a similar RAS in Vehicle Suspension


I tow a 31 foot trailer with my 1/2 ton. Before adding this product the sway was still noticeable, especially with 30 to 40 km wind gust, even with a Curt 4 point sway control hitch. After adding this product I noticed significantly lower sway and better towing.




by:

Review from a similar RAS in Vehicle Suspension


I read a lot of reviews before buying the Roadmaster Active Suspension system and was happy with what I read. I live in BC Canada and ordered the product at 01:30am April 27th 2022 and it arrived in perfect condition May 3rd. I was expecting to pay duty but there was non. Very happy with the fast informative service from etrailer. I could follow the item through transit updates as it was being shipped.
I have a 2020 Ford F-150 King Ranch with the 6' box. We're getting a 29' travel trailer, 5,000 lbs, this summer so I wanted to be prepared, at least regarding the suspension.
I installed the system the day it arrived. I took the wheels off for easy access which was pretty easy. The suspension has to be hanging free for the proper install. The system install was extremely easy. The installation instructions are simple and with pictures. Once the system was installed to spec I took it out for a test ride. It actually did make a difference for a smoother ride. It softened out the bumps without the jumping around an empty truck may experience. Not saying my truck was a rough ride to begin with but I did notice a change. Just have to get the trailer to test it out now. I'm already planning to get the Roadmaster Comfort Ride suspension kit for my new trailer so I should have a smooth riding system.




by:

Review from a similar RAS in Vehicle Suspension


Follow up to my earlier review.
On top
of the excellent care and service from etrailer, the roadmaster active suspension was easy to install. My Travel Trailer has a 1200lb hitch weight so I used the black spacer. The RAS gave my truck a 1 1/2” lift. I had recently loaded my truck to the top of the sidewalls with wood for the winter. Barely put a squat in the suspension. The truck handled on the highway like it had a quarter the weight. There was no noticeable sway or body roll. Unloaded the truck handles better than it did with just the leaf springs. Does not feel like hockey puck suspension. Love the RAS kit. My truck is a 2018 Ford F-150 eco boost with the max tow package. Looking forward to hooking up the Travel Trailer this fall.




by:

Review from a similar RAS in Vehicle Suspension


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:

Review from a similar RAS in Vehicle Suspension


Just had the roadmaster suspension assist installed today. The ride feels a bit smoother and truck back end feels tighter. Have not had a chance to hook up our 28 foot RV but I will be sure to revisit after. So far I feel good about this purchase


Comments
Still working great after 1 year! Sure love how it handles our 28 foot RV. More stable, less swaying and bounce
Forrest F - 04/11/2022


by:

Review from a similar RAS in Vehicle Suspension


Easy to instal on a 2014 F-150 4x4.Used the bump stop spacer even though installation was for 2015-present f-150 4x4. Many thanks to Corin for her help in getting the order sent in a timely manner. The only thing I forgot to do was measure the wheel well height before instal. I used the thicker black disk as I had concerns with tongue weight on the new trailer that I will pickup on Wednesday. Thanks again for the good service.


Comments
Great product. The truck is level when the trailer is hooked up and the stability is very good when getting passed by big rigs.
LRS - 06/23/2022


by:

Review from a similar RAS in Vehicle Suspension


I installed these springs on my 2007 Silverado 2500HD that is used for towing a bumper pull horse trailer. With two or three horses in the trailer plus camping gear in the bed, the truck tended to squat more than I liked. These springs totally fixed that issue. I was concerned that they would cause a harsh ride when unloaded and not towing, but I honestly haven't noticed a difference.

To install the springs, the rear of the truck needs to be raised by the frame high enough for the axle to hang freely from the leaf springs. This would be easily done on a lift. It was a little tricky lifting it high enough in my driveway, but it was doable with a large jack and some tall jack stands placed under the forward leaf spring mounts.

To set the tension, I tightened them to the thinner 1mm shim, plus an extra turn or two. It seems to be fine for my purposes so I intend to leave them there.



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See what our Experts say about this RAS Vehicle Suspension

  • What is the Purpose of the Weight Rating for Suspension Enhancement
    Any suspension enhancement like the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS4524-SAT for your 2011 Toyota Tacoma essentially just gives some extra support (up to 2,000 lbs worth) to your OEM suspension - it doesn't actually increase your tow weight rating. Basically these are used to help relieve stress on the OEM suspension and to help the suspension last longer and perform better under load. If the tow vehicle is rated to tow up to an 8K trailer then it can do that...
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  • What is Best Suspension Enhancement for 2019 Toyota Tacoma 2WD
    The best suspension enhancement we offer for your 2019 Toyota Tacoma SR5 2WD is the RoadActive Suspension kit part # RAS4524-SAT. This is a no-drill install kit that installs very easily, provides adjustable support, and unlike other options actually improves ride quality and stability loaded and unloaded.
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  • What Is the Difference Between RoadActive Suspension Kits for 2016 Toyota Tacoma 4WD?
    The difference between the RoadActive Suspension Kit # RAS4514-SAT and the # RAS4524-SAT is more than price. The # RAS4514-SAT is intended for vehicles in which the axle is located below the leaf springs and the # RAS4524-SAT is intended for vehicles in which the axle is located above the leaf springs. They look almost identical uninstalled, but the installation and function is different.
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  • Which RAS Suspension Kit Fits 2020 Toyota Tacoma
    Both RAS kits part # RAS4514-SAT and # RAS4524-SAT fit the 2020 Toyota Tacoma but you have to run out and look at your rear suspension first to determine if your leaf springs are above or below the axle. If they are below you need the # RAS4514-SAT and if they are above you need # RAS4524-SAT.
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  • Best Suspension Enhancement for 2016 Toyota Tacoma TRD Sport to Improve Handling and Stability
    The suspension enhancement we offer for your 2016 Toyota Tacoma TRD 4WD that will do the best job at reducing sway, body roll, and improve handling would be the RAS system part # RAS4524-SAT for if you axle is located above the leaf spring or part # RAS4514-SAT if yours is located below it. With just this alone you'll see a dramatic improvement in all of the things mentioned. We would not recommend running this with any other suspension enhancement.
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  • RoadActive Suspension Kit for a 2019 Toyota Tacoma 4 Door Long Bed 4WD
    Yes, it does make a difference and you will need to take a look at your leaf springs before you make your order to see which kit you will need. Both RoadActive Suspension kits item # RAS4514-SAT and item # RAS4524-SAT fit a 2019 Toyota Tacoma 4-Door Long Bed 4WD pickup but you have to look at your rear suspension first to determine if your leaf springs are above or below the axle. If your leaf springs are below the axle you will need the item # RAS4514-SAT and if they are above the axle...
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  • Is There a RoadActive Suspension Kit that Fits 2022 Toyota Tacoma
    We do have a RoadActive Suspension kit that fits your 2022 Toyota Tacoma with the part # RAS4524-SAT for if you axle is located above the leaf spring pack or the # RAS4514-SAT for if your axle is located below the spring pack.
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  • Recommended Suspension Add-On for 2020 Toyota Tacoma Towing with Weight Distribution
    I recommend going with the RoadActive Suspension Custom Leaf Spring Enhancement Kit, part # RAS4524-SAT for axle above leaf springs or part # RAS4514-SAT for axle below leaf springs. This system is going to engage automatically so there is no takeup like with upgraded jounce springs. They can also be adjusted to better suit your exact needs unlike upgraded jounce springs. In comparison to air bags, these will require maintenance whereas the RAS will not. They only offer the sleeve type...
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  • Will RoadActive Suspension For 2019 Toyota Tacoma Give Smoother Ride Than Timbrens
    That's a good question, and the answer is pretty straightforward - yes, the RoadActive Suspension (RAS) is going to give you a smoother, less bumpy ride than the Timbrens for your 2019 Toyota Tacoma. Like you mentioned, the Timbrens do their job well due to the stiffness of their rubber springs, but that stiffness can also cause the ride to be uncomfortable or even jarring as there isn't much give to them. The RAS will absolutely remedy that while providing the same - or better - enhancement...
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  • Towing Set Up For 2017 Tacoma And 2017 A-Liner Scout Camper
    You won't have any problems with weight capacity. An Aline has a dry weight of 1180 pounds and a 2017 Tacoma base model can handle 3500 pounds. I suggest getting RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS4524-SAT. These will improve stability, handling and help with trailer sway. If you need the hitch receiver I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C13264. You will also need a 7 way connection if you do not already have one. I...
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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Mary E
Written by:
Mary E
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
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