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Heavy towing or hauling doesn’t have to mean rear-end sag or light steering. The RoadActive Suspension Custom Leaf Spring Enhancement Kit adds 2,000 lbs of support by turning your stock leaf springs into a mechanically active suspension system. It automatically adjusts to your load so your ride stays level whether you’re carrying gear in the bed or pulling a trailer. With the weight balanced front to back, traction and braking stay solid and your truck feels planted instead of wallowing under pressure.

When weight hits the rear axle, this system reacts immediately—no waiting for air pressure or hydraulics to catch up. Variable-rated coil tension springs engage right away to absorb and support the added load, keeping the leaf pack from flattening out or twisting. That quick response stops axle wrap, eliminates wheel hop, and prevents bottoming out so your suspension keeps doing its job instead of fighting the load.

Long highway hauls and mountain curves can make a rig sway or lean hard when the load shifts. This kit reinforces your factory springs to reduce sway, body roll, and that uneasy rocking when a semi passes by. The result is steadier cornering, surer control, and a calmer ride when towing campers, boats, or heavy trailers—without adding extra hardware or friction points.
The RAS unit comes fully assembled and bolts under the leaf spring around the factory U-bolts—no drilling, cutting, or welding needed. Once installed, it’s maintenance-free with no air lines or adjustments to monitor. Durable epoxy e-coated steel construction and corrosion-resistant brackets rated for more than 800 hours of salt spray keep it working season after season without fussing over leaks or rust.
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 designed to fit your 2019 to 2023 Ford Ranger. And on custom fit parts such as this kit, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle, and our fit guide will confirm if this will work for you or if we have something comparable that will work for you.
Now, as you probably know, when towing or hauling a heavy load, you may encounter a number of problems that can make your driving experience difficult and even dangerous, such as sway, body roll, or bottoming out. When your truck is weighted down, your factory leaf springs can't counteract those problems to the extent that they are supposed to. The weight will overpower those leaf springs and cause them to twist and even flatten out. So when this happens, they can't support or level or stabilize your truck effectively. Additionally, because your factory leaf springs are passive, they won't begin to tackle the problems, such as sway, until those problems have already begun.
Now this kit is going to convert your truck's factory leaf springs into a mechanically active suspension system. It will actively strengthen your leaf springs for an 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, bottoming out. And it's gonna reduce dangerous sway and body roll when you're cornering.
This is even gonna help keep your ride level when you're towing or hauling a heavy load. It's gonna help improve traction while braking and accelerating. This does use the variable rated coil tension springs, which will automatically adjust to your vehicle's load. They're going to activate immediately to support extra weight, and then they'll disengage when unloaded, allowing your leaf springs to perform as intended. Now they can be adjusted during installation to help accommodate your towing or hauling needs, and they are independently adjustable for side to side leveling of any off-center loads.
These are gonna help extend the life of your truck's leaf springs, your truck shock absorbers, shackles, and even your tires. These are made here in the USA. They are constructed of a durable epoxy e-coated steel. The corrosion resistant brackets on the ends of each of these units here have a salt spray rating of more than 800 hours. And this is going to be an easy bolt-on installation. What's nice about this kit is there's no drilling, there's no cutting, there's no welding required. And this is going to secure under the leaf springs around the factory U-bolts. And actually I've got an image here that I'll just pop up on the screen there for you, just kind of give you an idea of how these install. So again, they're gonna secure under the leaf spring around the factory U-bolts. And they're going to arrive exactly as you see them here on my table. They're gonna be fully assembled, and the hardware's going to be included. So again, it's gonna be a relatively easy install. These are gonna be maintenance-free. Adjustments and monitoring aren't going to be needed once they're installed. And the weight capacity on these is 2000 pounds. However, I want to make an important note that these aren't going to actually increase your Ranger's load carrying capacity, so you wanna make sure that you don't exceed your manufacturer's weight capacity recommendations for your Ford Ranger. Well, I think that's gonna wrap up our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews

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?

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?

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