The Ronstan RF9004-13 Dyneema® Loop 4mm x 130mm is a premium soft attachment loop engineered for high-performance sailing and lightweight marine rigging applications. Manufactured from UV-stabilised SK75 Dyneema® fibre, this soft link delivers exceptional strength while remaining significantly lighter than traditional stainless steel shackles and fittings. Ronstan specifies that the RF9004-13 is made from premium SK75 Dyneema® and is approximately ten times stronger than steel for its weight.

Designed for modern sailing systems, the RF9004-13 provides a flexible, low-profile connection that reduces weight aloft, minimises hardware noise, and eliminates corrosion issues associated with metal fittings. With a 4mm diameter and 130mm internal length, it is ideal for attaching blocks, low-friction rings, strops, control systems, and specialist rigging hardware. Ronstan identifies this model as RF9004-13 with a 130mm internal diameter length, suitable for specific Ronstan hardware applications including RC72541.

The loop is manufactured using impregnated multi-strand Dyneema® fibres that provide outstanding resistance to UV exposure, abrasion, fatigue, and harsh saltwater environments. This makes it an excellent choice for racing yachts, cruising yachts, trailer sailers, sports boats, and foiling craft operating in demanding New Zealand conditions.

Whether upgrading an existing rigging system or building a lightweight performance setup, the Ronstan RF9004-13 offers exceptional strength, reliability, and durability.

Key Features

• Genuine Ronstan RF9004-13 Dyneema® Link
• Premium UV-stabilised SK75 Dyneema® construction
• 4mm diameter × 130mm internal length
• Lightweight soft attachment solution
• Approximately 10 times stronger than steel by weight
• Corrosion-free alternative to metal fittings
• Excellent UV resistance
• Outstanding abrasion resistance
• Flexible low-profile design
• Ideal for performance sailing applications
• Suitable for blocks and low-friction rings
• Long service life in marine environments

Ronstan states the RF9004-13 uses impregnated SK75 Dyneema® fibres for improved UV and abrasion resistance.

Why Buy the Ronstan RF9004-13 from Barton Marine NZ?

At Barton Marine NZ we supply genuine Ronstan sailing hardware trusted by New Zealand sailors, yacht racers, and marine professionals. The RF9004-13 Dyneema Loop is ideal for reducing rigging weight while maintaining exceptional strength and reliability.

Perfect for:

• Orbit Block™ attachments
• Low-friction rings
• Soft rigging systems
• Racing yachts
• Cruising yachts
• Sports boats
• Foiling dinghies
• Trailer sailers
• Custom Dyneema rigging
• Lightweight control systems

Technical Specifications

Ronstan publishes the following performance ratings:

• Basket Breaking Load: 1800kg
• Vertical Breaking Load: 900kg
• Weight: Approximately 2g

Common Applications

The Ronstan RF9004-13 is commonly used for:

• Orbit Block™ mounting
• Low-friction ring attachment
• Soft shackle replacement
• Cascading control systems
• Lightweight sail controls
• Barber haulers
• Mainsheet systems
• Performance yacht rigging
• Custom Dyneema strops
• Offshore racing applications

Ronstan soft links are commonly used as lightweight alternatives to shackles and metal fittings in modern sailing systems.

Performance Benefits

The Ronstan RF9004-13 provides:

• Exceptional strength-to-weight ratio
• Significant rigging weight reduction
• Corrosion-free operation
• Excellent fatigue resistance
• Outstanding UV durability
• Flexible low-profile attachment
• Reliable high-load performance
• Long-lasting marine durability

Ronstan recommends attaching Dyneema® links only to smooth, well-rounded mounting points to maximise service life and minimise abrasion