2021 Dunbier A1618G Mackay 10-Leaf Slipper Spring (Zinc Tech) | Marine Trailer Part

🔧 Product Description

Dunbier Ten-Leaf Slipper Spring 45mm × 780mm - Part Number: 2021

A heavy-duty ten-leaf slipper spring for Dunbier trailers requiring the highest capacity in the standard 45mm-wide, approximately 780mm-long spring family. The Dunbier catalogue rates the spring to 1000kg per spring.

⚙️ Key Features

• Ten-leaf heavy-duty spring pack

• 45mm width and approximately 780mm length

• Dacromet or zinc-flake marine coating

• Bushed front eye and slipper rear end

• Highest published capacity in the standard Dunbier 45mm spring range

📏 Specifications

• Leaf count: 10

• Width: 45mm

• Length: Approximately 780mm

• Published rating: 1000kg per spring

• Mackay reference: A1618G

🔄 Cross Reference & Related Parts

• Dunbier: 2021

• Mackay: A1618G

• Standard fish plate: Dunbier 2020

• Shackle bush: Dunbier 2060C/2060D

• Shackle bolt: Dunbier 2070C

🚤 Trailer Compatibility & Application

• Suits Dunbier trailers designed for the 45mm ten-leaf spring

• Use only with axles, tyres, U-bolts and chassis rated for the load

• Replace as a matched pair

🔌 Function

Supports heavy trailer load while absorbing vertical shock and allowing controlled slipper-end movement.

Common signs of wear or replacement:

• Broken leaves or loss of arch

• Front eye or bush wear

• Deep interleaf corrosion

• Trailer leans or bottoms out

• Spring clamps or centre bolt have failed

🛠️ Installation & Safety

• Use new U-bolts and fish plates

• Confirm the heavier spring does not reduce required suspension travel

• Replace both axle-side springs

• Torque suspension hardware correctly

• Recheck loaded ride height and tyre clearance

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one ten-leaf slipper spring

• Supplied in original or equivalent packaging