Hellwig Leaf Helper Spring

Hellwig Leaf Helper Springs: The Original American-Made Load Solution

When a loaded truck squats at the rear, steering gets vague, braking distances grow, and tires wear unevenly. Hellwig Products has been solving exactly that problem since 1946 — and the leaf helper spring is where the company's legacy began. Leaf helper springs are Hellwig's founding product category, and eight decades of continuous refinement show in every kit they ship today.

The concept behind a Hellwig leaf helper spring is elegantly practical. The springs sit on top of your factory leaf pack and work in conjunction with the stock springs to effectively raise the truck's level load rating up to its gross vehicle weight rating — without lifting the bed when empty. When unloaded, the helpers stay dormant and ride quality remains stock. Under load, they engage progressively to combat sag, body roll, and the loss of steering response that heavy cargo or a trailer can cause.

A Product Line Built for Every Hauling Need

Hellwig offers several distinct leaf helper spring series, each engineered for a specific duty level:

• EZ-550 — The entry-level light-duty kit, manufactured from heat-treated ASTM 5160 alloy spring steel and rated up to 500 lbs. of level load capacity. Ideal for occasional light towing and occasional bed loads on half-ton trucks and SUVs.
• EZ-990 / EZ-1000 — Mid-range kits stepping up capacity for small trucks, SUVs, and vehicles that need reliable assistance under more frequent loads, with the EZ-990 rated up to 2,000 lbs. of level load capacity.
• LP-25 (Load Pro 25) — Designed for half-ton trucks, rated at 2,500 lbs., and considered one of the most popular load-assist designs ever introduced in the light-truck aftermarket.
• LP-35 (Load Pro 35) — Hellwig's heavy-duty solution for 3/4-ton and one-ton trucks, rated at 3,500 lbs. and finished with a durable hammertone coating over grade 8 hardware throughout.

Across the entire lineup, load capacity ranges from 500 lbs. all the way to 3,500 lbs., so whether you're hauling a loaded utility trailer or running a truck camper full-time, there's a Hellwig kit sized for the job.

What Sets Hellwig Apart in This Category

Several engineering details distinguish Hellwig leaf helper springs from generic bolt-on alternatives. All kits feature a patented bolt-on design that mounts above the factory leaf pack using common hand tools — no shop lift or spring compressors required. The heavy-duty U-bolts included in every kit are adjustable, allowing independent left-and-right tensioning so uneven loads can be corrected side-to-side. The Pro Series kits also include polyurethane stability blocks that keep tension between the helper and the main leaf, preventing noise and actively resisting body roll in corners or crosswinds.

Material quality is non-negotiable at Hellwig. Every spring is forged from heat-treated ASTM 5160 alloy spring steel — the same high-carbon chromium alloy used in performance spring applications — inside their ISO 9001-certified factory in Visalia, California. As a founding member of SEMA and an 80-year-old family-owned manufacturer, Hellwig has never moved production overseas, and all steel products carry a limited lifetime warranty covering the normal life of the vehicle on which they are originally installed.

For truck and SUV owners who tow travel trailers, haul equipment, or carry truck campers regularly, Hellwig leaf helper springs represent one of the most straightforward, cost-effective upgrades available — no air compressor, no reservoir, no periodic maintenance. Install once, adjust to your load, and drive with confidence.