Ronstan RF25109HL High Load 20mm Ball Bearing Pulley

The Ronstan RF25109HL High Load Single Pulley is a compact, ultra-durable 20mm block engineered for demanding sailing applications. Designed for strength and efficiency, it features a high-load acetal ball bearing sheave combined with a reinforced stainless steel frame and glass-fibre composite cheeks — delivering exceptional load-handling capacity without extra weight.

Perfect for control lines, vang systems, downhauls, and other high-load rope applications, the RF25109HL provides smooth rotation and minimal friction even under extreme loads, making it a preferred choice for performance sailors and rigging specialists.

Specifications:

• Product Code: RF25109HL

• Sheave Diameter: 20mm

• Max Rope Diameter: 6mm

• Pin Diameter: 4mm

• M.W.L. (Maximum Working Load): 350kg

• B.L. (Breaking Load): 1000kg

• Sheave Type: Acetal ball bearing

• Materials:
  – Cheeks: UV-stable glass-fibre reinforced nylon
  – Frame: Stainless steel reinforcement
  – Sheave: UV-resistant acetal

• Weight: Approx. 17g

Key Features:

• High-load bearing design in compact form

• Efficient ball bearing sheave for smooth rope handling

• Stainless steel frame for superior strength

• Lightweight, corrosion-resistant materials

• Ideal for performance dinghies, catamarans, and small keelboats

Whether you're racing or cruising, the Ronstan RF25109HL offers reliable strength and efficiency in a compact package — available now at Barton Marine NZ.