Allen Brothers 30mm Dynamic Block – Fork with Kicker Key (A2030F-873)
The Allen Brothers A2030F-873 is a specialist 30mm Dynamic block supplied with the SA.873 heavy-duty ILCA vang key, designed specifically for use as the top block in ILCA (Laser) vang systems. With a maximum rope diameter of 8mm, it delivers smooth, reliable performance in one of the most load-sensitive control systems onboard.
Built on Allen’s proven Dynamic platform, this block is optimised for constant sheave movement and efficient load handling in high-use applications.
Purpose-Built for ILCA Vang Systems
This version of the A2030F is supplied pre-configured with the SA.873 heavy-duty vang key, allowing direct integration into ILCA kicker systems.
Designed as the top vang block, it provides:
- Correct geometry for ILCA rig layouts
- Secure and reliable connection to the mast fitting
- A durable solution for high-load, frequently adjusted systems
This makes it the ideal choice for sailors looking for a purpose-built, class-appropriate setup.
Fork Head with Removable Clevis Pin
The block features a fork head attachment with a removable clevis pin, enabling:
- Quick and secure installation
- Easy removal for maintenance or rigging changes
- Controlled articulation under load for improved alignment
This ensures the block remains correctly orientated within the vang system, reducing unnecessary friction and wear.
Dynamic Bearing System for Smooth, Consistent Performance
At the heart of the A2030F-873 is Allen’s patented Dynamic bearing system:
- Twin rows of stainless steel ball bearings
- Stainless steel bearing rail
- Acetal sheave
This setup provides low friction and smooth sheave rotation, even under continuous adjustment. Compared to systems using plastic bearing races, the stainless-steel rail improves load distribution and long-term durability.
Integrated Becket for Efficient Cascade Systems
The large central rivet acts as a rope-friendly becket, allowing:
- Direct line termination within the block
- Cleaner, more compact cascade systems
- Reduced need for additional fittings
In vang systems, this helps simplify rigging while maintaining efficient load transfer.
A Dedicated Solution for Performance Dinghy Setups
The A2030F-873 combines a proven low-friction bearing system with a purpose-designed ILCA vang interface.
For sailors rigging or upgrading an ILCA kicker system, it offers a reliable, class-specific solution that delivers consistent performance under load while maintaining a clean and efficient setup.
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