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When you hook up a trailer or load the bed, the last thing you want is rear-end sag throwing off steering and braking. The RoadActive Suspension Custom Leaf Spring Enhancement Kit adds up to 2,000 lbs of support to help keep your truck level and balanced when towing or hauling. Its variable-rated coil tension springs automatically adjust to your load, so traction stays strong and your ride height stays right where it should.

This system converts passive leaf springs into a mechanically active setup that reacts instantly as weight changes. When loaded, the coil springs engage to absorb and support the extra weight, stopping sag before it starts. Unloaded, they disengage so your leaf springs can flex naturally without stiffening the ride. You get load support when you need it and smooth handling when you don’t.

Under heavy loads, stock leaf springs can twist or flatten out, leading to axle wrap, wheel hop, and body roll. This kit tackles all three at once. The tension springs reinforce the leaf pack to prevent axle rotation and keep the tires planted for steady traction. The result is less sway through corners and smoother control on rough roads or in windy conditions.

The fully assembled units are made from high-grade alloy steel with an epoxy e-coat for corrosion resistance. Brackets have a salt spray rating of more than 800 hours, so they’re built to last through years of weather and work. Installation is straightforward—just bolt the system under the leaf springs using factory U-bolts with no drilling, cutting, or welding required. Once installed, it’s maintenance-free and ready to perform every time you tow or haul.



Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi everybody. Andy here with etrailer.com. Let's take a look at this RoadActive suspension custom leaf spring enhancement kit. Now this kit has been specifically designed to fit your 1973 to 1983 Ford F-100, F-150, F-250, and F-350. Then your 1984 to 1991 F-150, F-250, and F-350. Then your 1992 to 2002 F-150.
And then your 1997 to 1999 F-150 and 250 Light Duty. Now in custom fit parts such as this kit, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Just input the year, make, and model of your vehicle and our fit guide will confirm if this will work for your vehicle or if we have something comparable that will work for you. So 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, and bottoming out. When your vehicle is weighed down, your factory leaf springs can't counteract those problems to the extent that they're supposed to.
The weight will overpower the leaf springs and cause them to twist or flatten out. So when that happens, they can't support level or stabilize your truck 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. So this kit will convert your truck's factory leaf springs into a mechanically active suspension system. It will 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's going to eliminate axle wrap, wheel hop, and bottoming out. 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 the variable-rated coil tension springs, which will automatically adjust to your vehicle's load.
They activate immediately to support the extra weight and then they'll disengage when unloaded, allowing your leaf springs to perform as they're intended. They can be adjusted during installation to accommodate your towing or hauling needs. They are independently adjustable for side to side leveling of any off-center loads. And these will help extend the life of your leaf springs. Also, your shock absorbers, shackles, and even your tires. These are made here in the USA. They're constructed of durable epoxy coated, epoxy e-coated steel rather. And then the corrosion-resistant brackets on the ends of each of these are going to have a salt spray rating of more than 800 hours. This is going to be an easy bolt-on installation. You're not gonna have to worry about drilling, cutting, or welding. And I have a few pictures there, hopefully giving you an idea of how these are going to install on your truck. These are going to secure under the leaf spring and around the factory U-bolts. So hopefully that gives you a good idea of what the installation's going to look like once they're installed. These are going to arrive in the box just as you see them laid out here on my table. They're gonna be fully assembled. The hardware's included. They're maintenance-free. And adjustments and monitoring aren't going to be needed once they're installed. Now the weight capacity on these is 2,000 pounds. However, an important note to remember is that this kit does not actually increase your truck's weight carrying capacity. So you wanna make sure that you do not exceed your truck manufacturer's recommended weight limit or capacity. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Ratings & Reviews

Mike L.
6/23/2026
Nicely done, Sam! Thanks for the photos, we always appreciate those!

John
9/14/2026
Well It has not failed me yet. Being basically a spring under load all the time I am assuming the spring will stretch some over time and I will have to adjust tension accordingly. The pickup sits nicely on the thinner washer setting so I am leaving it there and hopefully that will help the system last longer.

Brooke M.
6/25/2025
Looks great, Les :) I hear lots of good this about this option for suspension enhancement and how you said, even without towing it can improve the ride quality. Glad to know that you are happy with them, too! do you have any upcoming camping trips planned?

Sergio J.
8/13/2021
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 J.
8/16/2021
Just like when I bought it.

Miguel
7/10/2022
Its been working very well i loaded a couple of times and its awesome

Rick M.
3/27/2022
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.

Rich
3/10/2021
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.

William
3/30/2021
Makes the ride a little stiffer but its a truck. Great when pulling my 37 camper. Helps out a lot!!!!

Russell
9/2/2023
OMG!! I have done extensive traveling with my trailer over the last year and the RAS system has made a huge difference in sway, road buffeting and squat. I can’t imagine not having this on any vehicle that tows!

Michael
7/7/2023
Removed the Suspension Enhancement and installed Airlift. Cost more but rear-end isnt sagging 4.
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Gwendolyn Y.
7/23/2025
That's a long trek, so I'm glad these helped you along the way! Do you take that trip often, Elden?