To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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Big trailers and heavy bed loads can make a truck sag in the rear, throwing off steering and braking. The Hellwig Load Pro 35 Heavy Duty Helper Springs add up to 3,500 lbs of support above your factory leaf springs to keep your ride level and steady when towing or hauling. With the added support, your suspension, tires, and brakes last longer while your handling stays predictable and safe under load.
When weight shifts or roads get rough, body roll and bounce can make the drive tiring. These custom helper springs flex with your existing leaf springs to keep movement under control. The result is a smoother, more stable ride that feels planted whether you’re hauling a camper, towing a boat, or carrying tools in the bed.
Uneven loads can make one side of your truck sit lower than the other. Each side of the Hellwig Load Pro 35 can be adjusted independently so you can fine-tune balance from left to right. That means you keep proper alignment and stable handling even when cargo weight isn’t perfectly centered.
Work trucks and travel rigs see plenty of miles and weather, so strength matters. The Load Pro 35 springs are made from durable steel with a silver vein hammer tone powder coat finish that resists corrosion. The bolt-on hardware kit is included for straightforward installation above your factory leaf springs, giving you long-term load support that’s ready for regular heavy-duty use.
If your vehicle is equipped with a brake fluid proportioning valve this constant rate spring is not recommended. Only progressive rate helper springs should be used. If your vehicle is equipped with a factory contact overload it may need to be removed before installing the new helper springs. Please consult the installation guide. Do not install on vehicles with composite (plastic) leaf springs.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello, everybody. This is Jeff at etrailer.com. Today I'm gonna take a look at these Hellwig Load Pro 35 heavy duty helper springs with the custom mounting kit. Now, this is a custom-fit part. It is designed to fit the 2011 to 2019 Chevrolet Silverado and GMC Sierra 2500 and 3500H heavy-duty trucks, and on a custom fit part like this, I like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show if this will work for your application. Now, this is a Load Pro 35 spring set, features a nice full-time spring rate design, which is ideal for vehicles or fleet applications that consistently carry a heavy load day in and day out.
The full-time spring rate on these adjust to the load on your vehicle for a nice and improved ride, but it won't affect your ride while it's unloaded. One note I do want to mention, if your vehicle's equipped with a brake fluid proportioning valve, this constant rate spring is not recommended. Only progressive rate helper springs should be used. Now, these custom helper springs upgrade your factory leaf springs to reduce sway and body roll. They'll prevent sagging when you're towing or hauling heavy loads, which will extend the life of your factory suspension, tires and brakes.
Each spring uses four helper leaf springs, which will flex with the factory leaf springs to limit bouncing while providing optimal stability. They're very easy to install. They'll bolt above your factory leaf springs. As you can see, I hung the mounting kit on here just to show you how it installs. The drivers' and the passenger sides can be adjusted independently for uneven loads.
The custom installation kit does include zinc-plated hardware. Now, one note, if your vehicle is equipped with a factory contact overload, it may need to be removed before installing these helper springs. I would recommend to please consult the installation guide. These are a durable steel construction. They ensure long lasting performance.
One thing I wanted to mention to zoom in on is they do use a nice silver-vein hammer tone finish on it, which is a powder coat finish, helps resist corrosion and besides makes it looks very good also. These parts are made in the USA. A few specs on this, the weight capacity is 3,500 pounds. One thing I do wanna mention is these Hellwig helper springs will not increase your vehicle's weight carrying capacity, but that should do it for the review on the Hellwig Load Pro 35 heavy duty helper springs with the custom mounting kit.
Customer Satisfaction Score:
96% were satisfied with this product
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Ratings & Reviews
Brooke M.
5/15/2025
Wow, 2 months in Alaska? That must have been beautiful. Would I be correct in assuming you got a front row view of the Northern Lights during your trip?
Brooke M.
4/8/2025
Hey Charles! Glad you able to improvise but I really feel bad it arrived missing pieces. Let me look into this more closely for you.
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Mike L.
7/14/2026
I wish we did too, Otis! The problem is that we have multiple warehouses. We don't stock everything at our Wentzville location where we used to offer will call which caused problems. We decided that although it's a great idea, we shouldn't do it if we can't do it right.