Ronstan RF2331 Fine Tune Stay Adjuster – 4.8mm Pin Stainless Rig Tensioner

Dial in your rigging with precision using the Ronstan RF2331 Fine Tune Stay Adjuster—a high-performance fine-adjustment rig tensioner designed for accurate, repeatable stay tuning on sailing boats.

Unlike standard stay adjusters, the RF2331 features 17 closely spaced adjustment holes at 4mm increments, allowing much finer control over rig tension. This makes it ideal for sailors who need to optimise sail shape and performance across varying wind conditions.

Manufactured from marine-grade 316 stainless steel, this adjuster offers excellent corrosion resistance and durability, ensuring long service life even in harsh saltwater environments.

A key feature is the unique retaining system, which reduces the risk of losing the stay while adjusting tension—an important safety and convenience benefit when tuning rigging on the water.

The inclusion of a fast pin mechanism enables quick and easy adjustment, making it ideal for both racing sailors who need rapid tuning and recreational users who want simple, reliable operation.

Designed for dinghies, catamarans, and small keelboats, the RF2331 is a premium choice where fine control and repeatability are critical.

Key Features

• Fine-tune adjustment system – 4mm increments for precise rig tuning
• 17 adjustment positions – wide and accurate adjustment range
• 4.8mm (3/16") pin size – suits common small boat rigging
• Unique retaining system – reduces risk of losing stay during adjustment
• Fast pin operation – quick and easy adjustments
• 316 stainless steel construction – corrosion-resistant and durable
• Compact and lightweight – ideal for performance setups

Specifications

• Brand: Ronstan
• Model: RF2331
• Product Type: Fine tune stay adjuster
• Pin Diameter: 4.8mm (3/16")
• Adjustment Increment: 4mm
• Adjustment Length: 64mm
• Total Length: 115mm
• Adjustment Positions: 17
• Weight: ~65g
• Material: Grade 316 stainless steel

Ideal Applications

• Dinghy and skiff rigging
• Catamarans and trailer yachts
• Small keelboats
• Forestay and shroud fine adjustment

This adjuster is ideal when you need precise, repeatable rig tuning rather than coarse adjustments.

Why Buy from Barton Marine NZ?

• Trusted NZ sailing hardware supplier
• Fast nationwide delivery
• Genuine Ronstan rigging components
• Ideal for NZ sailing conditions

Pro Tip 

• Use the RF2331 when fine sail shape tuning matters (racing or performance sailing)
• For quicker coarse adjustment, consider standard adjusters—but for precision, this is superior
• Always secure pins properly with clips to ensure safe rigging under load