Heavy-Duty 8-Blade 36" Semi-Elliptical Leaf Spring (980kg Pair Capacity / 44.5x6mm)

The Heavy-Duty 8-Blade 36" Semi-Elliptical Leaf Spring (44.5x6mm) is an extended-span trailer suspension component engineered to provide compliant shock absorption, supple highway articulation, and dependable load-bearing stability for commercial goods trailers, touring caravans, utility haulers, horseboxes, and agricultural equipment. Rated for a combined load capacity of 980 kg per pair, this multi-leaf spring assembly utilizes an extended 36-inch (~914 mm) mounting span to deliver a smoother, less jarring ride compared to shorter leaf packs, effectively isolating the trailer body and cargo from severe road impacts.

Constructed from eight graduated leaves of automotive-grade spring steel measuring 44.5 mm wide by 6 mm thick, the elongated geometry distributes vertical axle loads across a broader chassis span. This design significantly reduces high-frequency road vibrations, eliminates harsh rebound bounce when towing empty or lightly loaded, and ensures progressive resistance as cargo weight increases. Built with a classic eye-to-slipper configuration, the spring easily integrates into standard trailer chassis hanger channels, ensuring reliable trailing-arm suspension geometry and long operational service intervals.

Key Features & Benefits:

• Extended 36-Inch Span (~914 mm): Longer spring length provides increased suspension travel and deflection compared to standard 27" springs, delivering a noticeably softer, more compliant ride over rough roads and highway expansion joints.

• 8-Blade Graduated Multi-Leaf Stack: Multi-layer construction progressively absorbs roadway shock and dynamic vibrations, safeguarding trailer chassis welds, delicate cargo, and onboard fixtures.

• 980kg Combined Load Rating (Per Pair): Calibrated for light-to-medium utility and touring applications, supporting up to 490 kg per individual spring assembly.

• Standard 44.5x6mm Leaf Profile: Formed from 44.5 mm wide by 6 mm thick high-tensile spring steel leaves, ensuring balanced flexibility, lateral stability, and resistance against blade sagging.

• Smooth Articulation & Reduced Trailer Bounce: Elongated spring arc minimizes erratic trailer bouncing when unladen, improving high-speed tracking and stability behind the tow vehicle.

• High-Tensile Quenched & Tempered Spring Steel: Oil-quenched and tempered to resist fatigue failure, inter-leaf cracking, and loss of arch height over extended high-mileage use.

• Standard Eye-to-Slipper Mounting: Front rolled and bushed spring eye mounts directly into the forward chassis hanger, while the slipper tail glides inside the rear bracket, allowing free longitudinal expansion during compression.

Ideal Applications:

• Touring Caravans & Camper Trailers: Extended-span suspension upgrade engineered to absorb road chatter and protect delicate internal caravan cabinetry, electronics, and appliances.

• Commercial & Utility Trailers: Ideal for single-axle goods trailers, luggage haulers, furniture movers, and enclosed cargo trailers requiring smooth, stable towing.

• Horseboxes & Livestock Transporters: Provides a gentler ride that minimizes animal fatigue and stress when traversing uneven rural gravel roads.

• Boat & Marine Trailers: Long-span suspension well-suited for long-drawbar marine trailers hauling lightweight speedboats, ribs, and dinghies.

• Agricultural Utility Carts: Running gear for farm wagons, mobile compressors, and site service platforms operating on rough field terrain.

Product Specifications:

• Product Name: 8 Blade Spring 36" (44.5x6mm)

• Product Category: Suspension / Leaf Springs

• Spring Type: Heavy-Duty Semi-Elliptical Leaf Spring (Eye-and-Slipper Design)

• Number of Blades: 8 Blades

• Spring Length (Mounting Span): 36 Inches (~914 mm)

• Blade Dimensions: 44.5 mm Width x 6 mm Blade Thickness

• Load Rating: 980 kg per Pair (490 kg per Individual Spring Assembly)

• Installation Orientation: Front Spring Eye mounts towards the front of the trailer

• Material: Quenched & Tempered High-Tensile Automotive Spring Steel

• Application Compatibility: Trailers, Caravans, Horseboxes, Utility & Agricultural Vehicles

• Condition: Brand New Heavy-Duty Commercial Vehicle Hardware