Heavy-Duty 6-Blade 36" Semi-Elliptical Leaf Spring (740kg Pair Capacity)

The Heavy-Duty 6-Blade 36" Semi-Elliptical Leaf Spring 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, camping trailers, horseboxes, and agricultural equipment. Rated for a combined load capacity of 740 kg per pair (370 kg per individual spring assembly), this multi-leaf spring assembly utilizes an elongated 36-inch (~914 mm) mounting span to deliver a noticeably smoother, less jarring ride compared to shorter leaf packs, effectively isolating the trailer body and cargo from harsh road shock.

Constructed from six graduated leaves of automotive-grade spring steel, the elongated geometry distributes vertical axle loads across a broader chassis footprint. This configuration significantly reduces high-frequency road vibrations, eliminates erratic rebound bounce when towing unladen or lightly loaded, and ensures progressive resistance as payload increases. Built in a classic eye-to-slipper configuration, the spring easily integrates into standard trailer chassis hanger channels, ensuring positive trailing-arm axle geometry and extended service intervals.

Key Features & Benefits:

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

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

• 740kg Combined Load Rating (Per Pair): Calibrated for light-to-medium utility and touring applications, supporting up to 370 kg per individual spring assembly.

• Smooth Articulation & Reduced Bounce: Elongated spring arc minimizes trailer hopping and vibration when running empty, 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 long-term, high-mileage use.

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

• Superior Roll & Tracking Stability: Multi-leaf architecture provides balanced lateral rigidity to control trailer body roll and sway during highway cornering or in crosswinds.

Ideal Applications:

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

• Light 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 light speedboats, dinghies, and runabouts.

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

Product Specifications:

• Product Name: 6 Blade Spring 36"

• Product Category: Suspension / Leaf Springs

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

• Number of Blades: 6 Blades

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

• Load Rating: 740 kg per Pair (370 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