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  1. Vehicle Suspension
  2. Hellwig
  3. Leaf Springs and Helper Springs
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Standard Duty
FITS 2015 Freightliner Sprinter
Hellwig Load Pro 25 Progressive Helper Springs with Custom Mounting Kit - 3" Wide
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Hellwig Load Pro 25 Progressive Helper Springs with Custom Mounting Kit - 3" Wide

Part Number: HE64TR
In Stock
$575.87
Vehicle Suspension
Confirmed to Fit
2015 Freightliner Sprinter

2500

3500

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We'll connect you with nearby partnered installers who know this exact setup.
2,500-lb Load leveling capacity. Custom helper springs install above your Freightliner Sprinter's rear factory leaf springs to reduce sway and prevent sagging when towing or hauling heavy loads. Includes bolt-on installation kit. Great Prices for the best vehicle suspension from Hellwig. Hellwig Load Pro 25 Progressive Helper Springs with Custom Mounting Kit - 3" Wide part number HE64TR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (3)
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2015 Freightliner Sprinter - Hellwig Load Pro 25 Progressive Helper Springs with Custom Mounting Kit - 3" Wide

Highlights

  • Designed to Fit Your 2015 Freightliner Sprinter: Mounts to existing attachment points
  • 2,500-lb Load Support: Keeps your truck level and stable when towing or hauling heavy loads.
  • Prevents Sag and Roll: Stops rear-end squat and sway so steering and braking stay consistent.
  • Smooth Ride Under Any Load: Progressive springs flex with your leafs for control without harshness.
  • Handles Uneven Cargo: Adjust each side separately to level out tools, trailers, or off-center loads.
  • Quick Bolt-On Install: Mounts above factory leaf springs with included hardware and U-bolts.
Made in USA

Features to know about

Keep Your Truck Level Under Load: 2,500-lb Load Leveling Capacity

Heavy trailers and bed loads can make the rear of your truck sag, throwing off handling and braking. The Hellwig Load Pro 25 Progressive Helper Springs add up to 2,500 lbs of load leveling capacity to keep your ride level and steady when towing or hauling. By upgrading your factory leaf springs, they reduce sway and body roll so your truck stays balanced and confident even under weight.

Smooth Ride on Every Trip: Progressive-Rate Spring Design

These helper springs use a progressive rate design that automatically adjusts to the load on your vehicle. When unloaded, they flex with your leaf springs for a smooth, comfortable ride. As the weight increases, they step up stiffness to deliver extra support and stability right when you need it. It’s a setup that handles both daily driving and heavy towing without making the unloaded ride harsh.

Fine-Tune Support for Any Load: Adjustable U-Bolts and Independent Sides

Not every haul is perfectly balanced, and that’s where adjustability matters. The U-bolts on these springs can be set to match different loads, letting you dial in support side-to-side for uneven cargo. Each side can be adjusted independently so your truck rides level even if one side carries more weight than the other.

Built to Last Through Years of Work: Durable Steel with Corrosion-Resistant Finish

Made from durable steel with a silver vein hammer tone powder coat finish, these helper springs are built to handle long-term use in tough conditions. The coating resists corrosion so the hardware keeps its strength and looks sharp over time. With a custom bolt-on installation kit included, you get a solid suspension upgrade that’s made for real work and steady performance mile after mile.

Comparison image of Hellwig Load Pro 25 Progressive Helper Springs showing different Hellwig spring models and hardware for vehicle suspension enhancement.

Specs

Weight and Capacity

  • Weight capacity: 2,500 lbs

Warranty

  • Lifetime warranty

Note

  • Installation requirement: If your vehicle is equipped with a factory contact overload it may need to be removed before installing the new helper springs.
  • Guidance: Please consult the installation guide.
  • Vehicle compatibility warning: Do not install on vehicles with composite (plastic) leaf springs.

25351 Hellwig Load Pro Mounting Hardware Kit

2551 Hellwig Load Pro 25 Progressive Helper Springs - Above Axle

Installation Details HE64TR Installation instructions

Video of Hellwig Load Pro 25 Progressive Helper Springs with Custom Mounting Kit - 3" Wide
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Hellwig Load Pro Above Axle Heavy Duty Helper Springs Full Review

Hello, neighbors, it's Brad here from etrailer, and today we are taking a look at the Hellwig Load Pro 25 and 35 helper springs. That 25 is gonna be rated for a load capacity of 2,500 pounds, and 35 is 3,500 pounds. And really it's gonna be almost identical. That 3,500 just has that extra leaf for extra load capacity. Now, these are gonna be a great option if you're looking to beef up your suspension on your leaf springs by really reducing the amount of sag that you have, as well as a lot of other properties that go with towing and just normal driving. And when looking at suspension enhancements on a lot of vehicles, many times people go straight to airbags, which have their place, jounce bumper replacements, which also have their place, but maybe forget that you can add extra leafs to really work with what you already have.

And a lot of times people want airbags for adjustability, but you have adjustability with this, believe it or not. So let's break it down a little bit as to what it does and what makes it special. Now, I will say, with this series, being that it's pretty high capacities, you're gonna wanna make sure that this isn't something that you're just gonna be, you know, occasionally towing. If that's the case and you just need a little extra every time you tow, you might wanna look at Hellwig's other offerings that are at a lower capacity, because this is going to put a little bit more tension on, you know, leaf packs, especially on a 3/4 ton like we have here, and it could make it a little bit rough without that load on there. Now, it is adjustable, but that does mean that you are gonna have to tighten down nuts each time.

So really this would be set up for something like a fifth wheel, a gooseneck trailer, work trailers, you know, heavy-hauling stuff. But the main thing that this is gonna accomplish is it's gonna reduce bottoming out, it's gonna reduce that sag, it's gonna help with cornering traction. And overall, it's a super easy install as well. And once it's in place, there's no maintenance. So that's also a big plus of this.

As you normally drive, it may be a little bit tight, but I'll tell you this much, it's gonna help with sway control as well. Because it's limiting that flex on the leaf spring, it's gonna wanna keep that truck nice and planted. So even normal driving, it should enhance that handling capabilities and side-to-side body roll. So nice added benefit there. Now, what's really neat with this is, being that it goes onto your factory leaf spring pack, you can still put additional suspension enhancement, whether it be jounce bumpers or airbags.

But more than likely with that capacity, this should really do a good job of preventing you having to get any more. So overall, would I pick this over airbags or jounce bumper replacements Honestly, yeah, I think these are a great option, because it's really putting a lot of that on the leaf springs, whereas your airbags, you're still using that factory suspension. They do have their place if you're towing multiple different loads. But if this is a work truck and you know you're gonna have a heavy load or you know you have a heavy fifth wheel or gooseneck that you tow all the time, you really don't need it. If you're towing a bunch of different trailers, airbags might be the best option for you. Completely up to you. But I think the simplicity of this, the fact that it's a easy installation and other things can be added on really does make a big difference. Now, something that's gonna be important is these are custom fit to specific chassis, so it's really gonna be important to make sure that you use our fit guide to find the right product for you. This one is for a 17 Silverado 2500. So if you have an F-250 or if you have a Ram 2500, they're gonna look a little bit different. It's gonna be a similar spring pack like we have here, but just the way that it's gonna sit on the springs and attach to it might be slightly different. It's gonna be the same physics across the board. At the end of the day, we're trying to really limit how far those factory leaf springs can, you know, bend before these engage. And while we have one installed on the truck, let's take a look at it so you can see what it'll look like. So here installed on our truck, you'll see that it truly does just live on top of our factory leaf springs. It's got U-bolts that go to the center pack to keep that in place. And it does kind of follow almost the same geometry as your factory leaf springs, but seeing that it does taper up at the top, these U-bolts are really where your adjustment comes into play. And that's just gonna be tightening down these nuts. You do have a double nut to keep that in place once you adjust. But when it's at its minimum, as far as getting this tightened down, these can flex, and you're gonna have a little bit of space here to where it shouldn't affect your normal ride quality. Now, if you start cranking 'em down because you're hauling heavy loads and you want these to engage a little bit more, that's when you may start to see the ride quality being affected. But to be completely honest, I installed the basic version on my dad's truck and I started noticing that it helped the handling quite a bit. So comparing these to a sway bar, which Hellwig also makes really nice sway bars, the sway bar just will move up and down, but when you start to lean, that's when it kind of centers out the truck. And that's accomplishing the same thing here, but a sway bar doesn't help at all with sag. And if anyone tells you otherwise, I'm sorry, it doesn't work that way. It is just side to side movement, where this is two birds with one stone. So I really like that. You know, you're knocking out two potential problems on the truck with one product. I think that's a win. And as I mentioned before, depending on how you tighten it, it doesn't have to affect your ride at all. And then when you need that capacity, you can adjust that accordingly and tow with confidence. So if you're looking at suspension enhancement and you come across this page and you're curious about it, I'm here to tell you, these are pretty awesome. I'm really impressed by them. I think they're gonna be a great option for you if you're looking to fix that sag and really just get protection for your truck and get the best towing experience possible. So with that being said, thanks for joining us for a look at the Hellwig Load Pro 25 and 35 helper springs.

Ratings & Reviews

4.7

3 reviews
Review sort icon
2,500-lb Load leveling capacity. Custom helper springs install above your vehicle's rear factory leaf springs to reduce sway and prevent sagging when towing or hauling heavy loads. Includes bolt-on installation kit.

by:



by:

easy install
everything fit perfect
thank
you



by:

So far so good! purchased these for my old supercrew to locally haul my 16'trailer dbl axle utility trailer loaded with my 3540 W/cab/loader/box blade. Most of the machine weight (maybe 6K) is centered over the trailer axles, but these helper springs do a lot for keeping the sag up and balanced.


3
3

See what our Experts say about this Hellwig Vehicle Suspension

  • Comparing Hellwig And SuperSpring Helper Springs For 2023 MB Sprinter RV 3500 2WD Dually
    Hello Greg, thanks for reaching out. Between the options you mentioned, I recommend going with the Hellwig Load Pro 25 Progressive Helper Springs with Custom Mounting Kit # HE64TR. Installation of the Hellwig kit and the SuperSprings kit are pretty similar in that you jack up the vehicle and assemble and install the springs. In my opinion the Hellwig assembly is more straightforward and easier to adjust to your needs, so this will be the best for DIY install. The Hellwig springs also offer...
    view full answer...

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