Gertrdti FR350SDJ Rear Axle Helper Springs Kit for Ford F-350 (2017–2026) — Pair, Progressive Rubber

Gertrdti FR350SDJ Rear Axle Helper Springs Kit replaces factory helper springs to restore ride height, minimize rear sag, and stabilize load handling for Ford F-350 Super Duty trucks (2017–2026).

When you routinely carry heavy payloads or tow with your Ford F-350, factory rear suspension can compress uncomfortably and reduce control. The Gertrdti FR350SDJ kit offers a plug-and-play pair of closed-cell rubber helper springs engineered to match OEM dimensions for an accurate fit on both 2WD and 4WD F-350 models from 2017 through 2026. These springs are sold as left and right pairs, require no air systems or special tools for installation, and are designed to work progressively as load increases—reducing squat, sway, and body roll without adding maintenance tasks.

How will these springs change towing and heavy-load performance?

The FR350SDJ helper springs increase the effective rear load capacity and provide progressive resistance as weight is added. That means the truck maintains a more level stance under load, improving trailer alignment and reducing stress on the factory suspension.

• Rated capacity designed to support heavy payloads and reduce rear-end sag
• Progressive rubber construction that stiffens as load grows
• Improved towing stability with reduced trailer sway tendency
• Better braking performance with a more level vehicle posture

Are these Gertrdti springs easy to install for a DIYer?

Yes — the kit is engineered for straightforward installation without compressors, air lines, or specialized tools. The springs match OEM geometries so they bolt in place; the process is typically quick and can be completed in under 30 minutes by someone comfortable working under the truck.

• Sold as a matched left and right set for correct positioning
• No drilling or frame modification required for compatible models
• If the supplied bolt size isn’t right, replacement hardware is available upon request
• Low- or no-maintenance operation once installed

What safety and handling benefits should I expect on the road?

By reducing rear sag and stabilizing the chassis, the FR350SDJ kit helps keep steering and braking responses more consistent under load. Drivers will notice reduced body roll in corners, fewer instabilities during crosswinds, and improved directional control when accelerating or braking while towing.

• Reduced body roll for more confident cornering
• Improved straight-line stability in heavy crosswinds
• Enhanced traction and braking balance under load
• Consistent ride behavior whether empty or carrying weight

Will these springs fit my specific F-350 model year and drivetrain?

The FR350SDJ is tailored for Ford F-350 Super Duty trucks built between 2017 and 2026 and is compatible with both 2WD and 4WD configurations. They follow OEM dimensions to ensure a direct fit, but contact the seller if you have unusual aftermarket suspension or if bolt sizes in the kit do not match your truck—replacement fasteners can be provided.

• Compatible with 2017–2026 Ford F-350 Super Duty models
• Designed for both two-wheel and four-wheel drive variants
• Sold as a left/right pair for proper axle support
• Customer service available for installation issues or parts

Who is this for: The Gertrdti FR350SDJ Rear Axle Helper Springs Kit is aimed at F-350 owners who carry heavy loads, tow frequently, or want to restore factory ride height and control under load without adding complex equipment. It’s a practical choice for fleet vehicles, contractors, recreational truck owners, and anyone seeking a durable, maintenance-free helper spring solution that installs quickly and improves on-road confidence.