Upgrade your tandem-axle trailer with the Eye to Slipper 3500kg leaf spring kit and experience confident towing under demanding loads. Built for serious hauling, this pair delivers predictable handling, smoother articulation, and extended trailer life on and off the highway. What makes this kit stand out - Eye to slipper design tailored for centre rocker suspensions, delivering balanced weight distribution and controlled movement between axles. - 7-leaf pack with 50mm wide x 6mm thick leaves provides noticeably higher stiffness and durability for heavy-duty use. - 3500 kg maximum load rating gives you the confidence to tow boat trailers, car transporters, plant trailers, and other commercial applications without compromising stability. - Crafted from high-strength spring steel to reduce shock transfer, protecting your trailer frame and maintaining consistent towing performance over rough terrain. - Supplied as a pair for complete axle fitment, ensuring even load sharing across both sides of the tandem setup. Why this matters for you - Enhanced load capacity translates to safer, more stable towing when carrying heavy gear or equipment. - Improved highway stability means smoother, more predictable steering and reduced trailer sway at speed. - Better articulation across uneven surfaces minimizes frame stress and prolongs trailer life. - A purpose-built upgrade that fits standard centre rocker systems, making replacement straightforward and reliable. Key specifications at a glance - Load rating: 3500 kg (heavy-duty tandem axle application) - Design: Eye to slipper (centre rocker compatibility) - Leaves: 7-leaf pack - Leaf dimensions: 50 mm wide x 6 mm thick - Material: High-strength spring steel - Package: Supplied as a pair (two springs) Ideal applications and use cases - Boat trailers requiring robust suspension to cope with launching ramps and chop, while maintaining controlled handling. - Car transporters that demand reliable load distribution and stable towing across varying road conditions. - Plant trailers and other heavy-duty platforms that routinely haul dense loads over uneven terrain. - Maintenance or upgrade projects where a durable, long-lasting leaf spring solution is preferred over thinner or fewer-leaf options. Practical notes - Designed to be compatible with standard tandem axle rocker systems, enabling a straightforward swap or upgrade without custom fabrication. - By choosing a 7-leaf, 50x6 kit, you gain predictable performance under heavy loads and during long-distance travel, helping you protect both cargo and trailer integrity. If you’re upgrading an existing tandem-axle setup or outfitting a new heavy-duty trailer, the Eye to Slipper 3500kg leaf spring pair delivers the targeted stiffness, reliable stability, and long-term durability you rely on for demanding towing scenarios.