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Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Item # RAS34FR
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Our Price: $569.00
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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. Lowest Prices for the best vehicle suspension from RAS. Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty part number RAS34FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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RAS Vehicle Suspension - RAS34FR

  • Leaf Springs
  • Rear Axle Suspension Enhancement
  • RAS
  • Heavy Duty

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:

  • Heavy-duty 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: 3,000 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-TDHD RAS Custom HD Active Suspension System for OEM Leaf Springs - Rear Axle

Installation Details RAS34FR Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty - RAS34FR

Average Customer Rating:  4.8 out of 5 stars   (31 Customer Reviews)

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.

by:

I just finished installing this kit and the installation was very simple and smooth. I did take it for a no-load test run, and could tell the change. Can't wait to see how it does with a load, (my Quad).


Comments
This a great product, it truly helps the suspension of my truck, both with or without a load..works great!
Tony - 04/20/2022

by:
Toyota Tundra

This product did exactly what we wanted. Our Toyota Tundra suspension was lacking and sagged; this product brought the truck back to no sag while pulling our travel trailer.



by:
2019 Toyota Tundra

Added a Roadmaster Active Suspension Kit to my 2019 Tundra to reduce squat when towing my Travel Trailer with the fresh water tank full. The extra 400 lbs of water adds a lot of tongue weight. My experience with e-trailer is that they always ship “freaky fast”. As usual, my order was at my door in just a few days. The Roadmaster Active Suspension kit was nicely packaged with very good instructions. All components were well designed and manufactured. Installation went smoothly.


Comments
When originally installed, I adjusted these to the highest setting. That was more than I really needed. Backed it down to the lower setting. I get all the ride height control I need along with a better ride. Body roll, axle wrap and all the other unsettling gyrations are eliminated. Buy these, put em on and forget em.
Dave - 02/10/2022

by:

Fairly easy installation. Some say the instructions are really good, but I benefited from watching videos prior to starting. It could be done with one person, but it would have been much more difficult with some of the tight spaces to hold and turn in. When the directions say that you might have to expand the kit for installation, they aren't kidding. This is much easier to do prior to connecting the hook end. One note, I set my tension to the higher setting, and measured a rise of 1.5 inches in the rear of my truck when unloaded. I did not feel a difference when just driving. I will get an opportunity to tow in the near future and will update my review.



by:
2018 Toyota Tundra

Etrailer was very helpful on the ordering and shipping of the RAS suspension assist.
I have not installed yet that will be completed tomorrow, will write a follow up in a few weeks. Pictures 9f install will be added at next review.



by:

Stiffened up the rear of the truck considerably. Minimized trailer drop when hauling my camper, and has improved the ride stability when hauling around dirt and rocks. No more tire squish or taking it easy for this Toy. Excellent product, well designed, and easy to install on the driveway.



by:
2017 Toyota Tundra

I’ve heard etrailer is known for freaky fast delivery, the timeliness and value were even better than I anticipated!

Product showed up ahead of schedule and as advertised. Very easy to install and made a world of difference towing our 7k lb TT. Will NEVER haul without these again!



by:

Once again etrailer delivers. My order was shipped the same day I placed the order. I watched a couple of [online] videos on installing the Roadmaster Active Suspension and they commented on how easy the installation is. That was my experience as well. I have a Toyota Tundra so there is an additional step, you have to remove the rear shackle bracket to install the eye bracket. I called Roadmaster's tech support with a couple of questions and their advice was invaluable. There is only so much information you can print in the installation instructions so talking to tech support is well worth the call. I just installed this so I have not towed my trailer yet. Driving without a load the ride is a little more firm and the cornering is more flat.



by:

Install went smooth, hooked it up and it made a difference to my overland rig when fully geard up . Even kept the articulation in the rear.



by:

The part is fantastic but etrailer sent me the wrong size. I had ordered the beefier one.


Comments
Oh darn, we meant to send you the heavy duty Roadmaster for the 2015 Toyota Tundra 4WD part RAS34FR but it looks like we sent you the part RAS34FRfor the 2015 Toyota Tundra 4WD instead. I will have customer service take care of that for you
-- Etrailer Expert Jenny N - 06/24/2022
Comments
Oh darn, we meant to send you the heavy duty Roadmaster for the 2015 Toyota Tundra 4WD part RAS34FR but it looks like we sent you the part RAS34FRfor the 2015 Toyota Tundra 4WD instead. I will have customer service take care of that for you
-- Etrailer Expert Jenny N - 06/24/2022

by:
2021 Toyota Tundra

Was very easy to install on my 2021 Toyota Tundra , I cant wait to see how it does when I haul a Heavy load.
Lifted the rear up an inch.
Drives even smoother than it already did.



by:

Very fast shipping, easy to order. Will definitely use etrailer again



by:

I did not want to write this till I had some road time, both regular and towing. Easy install. I found a great [online] video, specific to my Tundra, and that helped a lot. I took my time and it was still under 2 hours install. Road manners were generally unchanged afterwards except there is noticeably less body roll on turns and the rear hitch rides 1 inch higher than before installation. I set my gap to the white disc for my first tow. I pulled 5500#s and it had a pretty good ride. Braking was very stable. I was also using an E2 weight distribution and sway control hitch. I did notice a little up and down movement under acceleration, but it was better than I have ever experienced in the past. Really pleased that performance matched the hype.



by:
2010 Toyota Tundra

Excellent. Great spring, installation was a breeze, preparation took most time. Installation was 20 minutes each. After truck loaded, front and rear heights are perfect



by:
2013 Toyota Tundra

Wow....What a difference! First off, the etrailer crew was fantastic and my order arrived a couple days early. The wife and I were scheduled to go camping the week following Thanksgiving and I wanted to install the RAS before we left so I could see if it lived up to the hype. It arrived the day before Thanksgiving while I was at work which gave me 2 days to attempt to install these on my 2013 Toyota Tundra. It took approximately 90 minutes to install......And I'm very meticulous about these things!! I had a little hiccup trying to extend the threaded rod, but etrailer support set me straight - On Thanksgiving!!! I took the beast out for a test drive and was amazed at the difference in the ride. I set them at 45% or the 2mm disk spacing and my truck rode like it was on rails. No more sway or body roll, even my wife noticed the difference! She said "I don't have to grab the Oh Sh!t handles anymore!" 2 days later we loaded up our travel trailer, a 30' trailer that weights about 8,000 lbs, and took off. The ride was sooooo much better. Very little sway from passing trucks, it was less bouncy, and we handled the corners much better. I highly recommend this product!


Comments
So far, so good. Still loving this product
Michael A - 12/07/2021

by:

It works good



by:
2008 Toyota Tundra

We have a 2008 Toyota Tundra. This really helped a lot with stability and sway (don't have a sway bar). We have a Trailer with a 700 pound tongue weight, and this product combined with our WDH lelveled everything out. When unloaded it did raise the rear of the truck about 2 inches, I will be adding a leveling kit to the front end.



by:

Installed RAS34FR on 2016 Tundra 2WD used to tow an RV Trailer with an 800 lb tongue weight (truck rated for 1000 lb). The Blue Ox hitch system we use sets ball behind rear bumper about 14" putting significant leverage disadvantage on truck, and even with weight distribution set up pretty high, truck rear squats way too much.

I really like the RAS system for many reasons including: relatively easy installation, less hassle once installed compared to air bags, minimal impact on truck ride loaded and/or unloaded, expect system to be durable over the long haul, no need to fuss with pressure adjustments of air bags, and ability to easily "self tune" amount of added support in unlikely event you may choose to alter it.

I will continue using system in towing our 4 ton RV trailer as well as doing typical home owner hauling. The RAS system ( the 3000 lb capacity option) set up for 40% assist has made a world of difference towing the RV. Truck now sets level even without heavy torque set on bars of Blue Ox hitch. Handling is back to normal; no sway, front of truck elevation neutral VS pitched upward, ride is good.

Please note that at the initial set up listed above, truck does set up about 1-1/2" higher when empty and ride is just a bit more stiff compared to stock (no RAS) ride. I may choose to back down on 40% assist level a bit in future to resolve these issues which are minor in my judgement.

etrailer service from Christina J was excellent. Shipping was trouble free and prompt. Communications were timely and to the point. Although the RAS price is high, overall I feel that I got what I paid for - a product that delivers the performance it brags about. eTrailer listing was accurate and helpful. It appears the RAS product reviews are legitimate VS the obvious fake ones you get on some other popular sites.

I recommend the RAS product and feel potential buyers can trust it will deliver within it's specifications for you.



by:

It’s the second set I’ve owned with my first being on a Tacoma. Followed directions when installing and it went smoothly.



by:
2002 Toyota Tundra

Awesome! Easy installation and works great. No more sag in the rear end.



by:

Promised they would delivery by friday and I got it thursday instead. Was able to install before fridays trip. Works great, worth the cost in peace of mind alone, never mond safer.



by:

Been in use for a year and still holding up.



by:

I can't say enough good about this system. Super easy install. What a huge difference this makes. It's like I'm driving a whole new truck! Highly recommend.



by:
2019 Toyota Tundra

Easy install quality parts. Fast delivery. Test drove nice can't wait to hook up to some weight.



by:
2017 Toyota Tundra

Super fast shipping and excellent customer support. Would highly recommend doing buisness with etrailer.


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Ask the Experts about this RAS Vehicle Suspension



  • Can RAS34FR Roadmaster Active Suspension System Be Used Along With Weight Distribution
    The US- made # RAS34FR Roadmaster Active Suspension kit is a fit for your 2006 Toyota Tundra and would be an excellent addition to augment your rear suspension and to improve your ride quality whether the truck is loaded or unloaded, towing or not. The system will work along with your Equal-i-zer weight distribution system to level out your ride height between the front and rear axles and will also help prevent axle wrap and wheel hop. You'll want to be sure to repeat the set-up procedure...
    view full answer...
  • Do I Have To Remove The Leaf Spring Eye Bolt To Install?
    That's a good question. I have seen videos of this product installed and many times the (part C) eye bracket hook just lays onto the leaf spring eye. However, since 2008 the Tundra's have required one side of the eye hook to be removed. I have attached the install procedure PDF file. Step 6 reads, "Remove one side and place it on top of the rear leaf spring eye bracket hook." They certainly could have provided a picture illustrating this and a better explanation. So yes, you do have...
    view full answer...
  • Will the Roadmaster Active Suspension System Lift the Bed of an Already Lifted Truck
    The Roadmaster Active Suspension system # RAS34FR effects the suspension, so it will work with any body lift that you may have in place. The RAS system will lift the rear of the vehicle approximately 1" to 1-3/4" depending on the truck, so the bed is also going to raise up in the process that same amount- so it's going to be in addition to whatever body lift has already been added.
    view full answer...
  • Helper Spring Recommendation For Rear End Sag While Towing With 2021 Toyota Tundra TRD PRO
    If the vehicle still squats even when using weight distribution, my first suspicion would be that the weight distribution system hasn't been set up correctly or the system being used is under-rated for the travel trailer's tongue weight + the weight of anything that's carried in the truck bed behind the rear axle. I'd suggest revisiting the initial setup to ensure things have been set up correctly. I'd also recommend confirming the the travel trailers fully loaded and ready to tow tongue...
    view full answer...
  • Will the Roadmaster Active Suspension for a 2017 Toyota Tundra Affect Payload
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS34FR for a 2017 Toyota Tundra has a pre-load after installation so it would be considered sprung mass. It essentially becomes part of the leaf spring. They however will not increase payload. In regards to braking, the affects would be marginal but the pre-load will place more weight towards the front axle where the majority of the braking force will be.
    view full answer...
  • Recommended RAS Suspension Enhancement For 2010 Toyota Tundra 5.7L 2WD Towing 8000lb Travel Trailer
    For your 2010 Toyota Tundra 2WD with a Snug Top Camper Shel towing a 34' Travel Trailer with 800lbs tongue weight and 8000lb trailer weight using a weight distribution hitch I recommend the Roadmaster Active Suspension Heavy Duty # RAS34FR with a 3000lb load capacity. This kit can be adjusted in two ways depending on the exact stiffness and load support you want, but in your case I would go ahead and use the lower setting which is the thinner spacer. The reason I recommend going with the...
    view full answer...
  • Rear Suspension Enhancement Recommendation for 2021 Toyota Tundra Hauling a Toy Hauler
    For your 2021 Toyota Tundra I definitely recommend the Roadmaster Active Suspension kit, # RAS34FR. Especially since you already have a WDS in play with your set-up. This provides great support in preventing sag and it improves handling and ride quality when either towing or not as the RAS adjusts to your load to level your ride. This attaches to your vehicle's factory leaf springs but converts them into a mechanically active suspension system reducing dangerous sway and body roll...
    view full answer...
  • Can I use a Roadmaster Active Suspension Kit and a Timbren System on a 2021 Tundra
    I recommend using just the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty item # RAS34FR and making sure it is adjusted properly. Yes, those 2 systems can both be installed on your 2021 Toyota Tundra. However, both of them combined would be a stiff uncomfortable ride.
    view full answer...
  • Looking For Replacement T-Brackets For An Aluminum Ladder Rack On A Trailer
    From looking at your picture, the Replacement T Bracket for Rack'em Fitz-All Enclosed Trailer Ladder Rack # RA34FR may work for you, but I couldn't tell for sure. With that being said, I created a diagram with all the measurements that should help. Please note that I am no artist and the diagram isn't pretty. However, the measurements are accurate. I did forget to include that the overall height of the part is 12". With the way the bracket is sitting in your picture, I think the inner...
    view full answer...
    Image 1 for Image 2 for
  • Best Rear Suspension Enhancement for 2021 Toyota Tundra
    For your 2021 Toyota Tundra the best rear suspension enhancement is the Roadmaster Active Suspension kit part # RAS34FR as it is very easy to install, provides adjustable support, does a great job eliminating sag, improves handling and stability, and unlike other options it improves ride quality when loaded and unloaded so it is the best all around solution.
    view full answer...
  • Best Suspension Enhancement System for a 2021 Toyota Tundra For a Self-Install
    I have a great suspension enhancement system that you can install on your 2021 Toyota Tundra. The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS34FR is going to be a great option to improve your vehicle's stability, handling, and control while you are towing or hauling, as well as when your vehicle is unloaded. 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...
    view full answer...
  • What Suspension Enhancement do You Recommend for My 2021 Toyota Tundra While Hauling Often?
    Since you haul pretty often on your 2021 Toyota Tundra, a great overall suspension option is the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS34FR. Not only will this enhancement kit prolong the general life on your factory springs, they also don't require any additional maintenance once installed on your vehicle. The great thing about the Roadmaster kit is that it eliminates axle wrap, wheel hop, and bottoming out. Also, it helps with vehicle sag if that is something...
    view full answer...
  • What Roadmaster Leaf Spring Enhancement do You Recommend to Eliminate Bouncing on My 2011 Tundra?
    The Roadmaster Active Suspension Custom Leaf Springs definitely add tightness and stability to your setup. If you do a lot of hauling, your OEM springs and shocks can use some extra support to make up for the normal wear/tear on your 2011 Toyota Tundra. Since you are hauling a 7500-pound travel trailer, I recommend using the heavy duty model # RAS34FR. The great thing about this kit is that it does add firmness to your setup while you are towing as well as when you are not towing. Also,...
    view full answer...
  • 2021 Tundra TRD Pro Spring Enhancement Kit For Increased Stability and Reducing Squat
    If you're already using a weight distribution system and are still experiencing squatting then you may want to check to ensure you have the proper weight distribution system for your trailer. I recommend going back and making sure the system has been set up properly. You should also check your trailers fully loaded and ready to tow tongue weight, which should include the weight of anything in the truck bed behind its rear axle. You'll want to check that this weight isn't more than the tongue...
    view full answer...
  • Higher or Lower Capacity Roadmaster Active Suspension Kit for 2005 Toyota Tundra
    I always recommend the higher rated Roadmaster Active Suspension kits like the part # RAS34FR that fits your 2005 Toyota Tundra. This gives you additional capacity if needed over the lighter duty model but also can be adjusted lower if ever needed as well.
    view full answer...
  • Heavy Duty Roadmaster Active Suspension That Fits 2017 Toyota Tundra 4x4
    Happy to help, and I was able to confirm with the manufacturer the correct Heavy Duty Roadmaster Active Suspension kit that is a fit for your 2017 Toyota Tundra 4WD, which is the following part: - Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS34FR The RAS is a really good choice for suspension enhancement for your Tundra, as it will keep your truck level, help with any body roll you might experience, while also giving your truck better traction and...
    view full answer...
  • Suspension Enhancement Recommendation for 2008 Toyota Tundra with Gooseneck Hitch
    For your 2008 Toyota Tundra the suspension enhancement I would recommend the highest is the Roadmaster Active Suspension kit part # RAS34FR as it gives you adjustable support like you are wanting but it also gives you a better ride quality and handling unlike the other options so it's the best overall solution.
    view full answer...
  • Best Suspension Enhancement for 2016 Toyota Tundra Towing Trailer with Bounce
    To prevent the bouncing you are experiencing and give you the best support and ride quality you'd want the Roadmaster Active Suspension kit part # RAS34FR. Unlike other similar options this would give you the best overall ride quality while giving you the support you need to prevent the bouncing.
    view full answer...
  • Will the Roadmaster Active Suspension for a 2016 Toyota Tundra Work With TRD Anti-Sway Bar
    The Roadmaster Active Suspension (RAS) Custom Leaf Spring Enhancement Kit part # RAS34FR is an excellent option for a 2016 Toyota Tundra. In regards to compatibility, there should not be any with upgraded anti-sway bars from what I can see. The RAS kit mounts above the leaf spring pack so you will be fine.
    view full answer...
  • Comparing RAS Leaf Spring Enhancement Kits RAS34FR and RAS4611TD For 2017 Toyota Tundra
    You are correct that there are two Roadmaster Active Suspension Leaf Spring Enhancement Kits for your 2017 Toyota Tundra, the # RAS34FR which has a 3000lb capacity and the # RAS4611TD with a 2000lb capacity. Between these two kits I recommend going with the # RAS34FR as it will give the most support to your suspension. These kits will not negatively affect your unloaded ride so there is not a down side in going with the heavier duty system. With the # RAS34FR you will not only get less...
    view full answer...
  • Are Adjustments Required For The Roadmaster Active Suspension?
    You will want to verify that you still have the correct amount of spring tension on the Roadmaster Active Suspension # RAS34FR on your 2012 Toyota Tundra SR5. I recommend keeping the gauges, 1mm and 2mm in your Tundra at all times. Before you load your Tundra or connect to your trailer you will want to ensure that the spring tension is properly set to prevent damage to the RAS and keep your Tundra as level as possible. Keeping your Tundra level will ensure that you maintain even braking...
    view full answer...
  • Best Suspension Enhancement For 2021 Toyota Tundra For Ride Quality When Towing
    The best thing you can add to your 2021 Toyota Tundra to improve the stability and ride quality of your truck when you are towing is an active suspension kit, and the correct one is going to depend on the amount of squat you have and/or the tongue weight you have: - Less Than 2 Inches of Squat and/or Less Than 600 lbs of Tongue Weight: Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611TD - More Than 2 Inches of Squat and/or More Than 600 lbs of Tongue Weight: Roadmaster...
    view full answer...
  • Recommended RAS Leaf Spring Enhancement For 2018 Toyota Tundra Towing Small 5th Wheel Trailer
    For your 2018 Toyota Tundra towing a small 5th wheel trailer with 1200lbs of pin weight I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611TD as it has a 2000lb load rating which is plenty for the weight of your trailer, and will do a great job of preventing sag and eliminating sway and body roll when your truck is loaded or unloaded. There is nothing wrong with going with the heavy duty # RAS34FR that has a 3000lb load rating, but you do not need...
    view full answer...
  • 2008 Toyota Tundra TRD 4x4 Dbl Cab Suspension Enhancement for Carry Camper in Bed
    For your 2008 Toyota Tundra that you will be carrying a camper in the bed of the best suspension enhancement by far is the Roadmaster Active System part # RAS34FR. This kit allows you to have adjustable suspension support that offers the best stability from side to side for campers and unlike other options it doesn't hurt the ride quality. Many report the ride quality actually improves.
    view full answer...


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Do you have a question about this Vehicle Suspension?




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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Adam E
Installed by:
Adam E
Employee Chris R
Video Edited:
Chris R
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
Alex H
Employee Noah M
Updated by:
Noah M

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