Ronstan RF55111 55mm Single Block with Becket | Series 55 Sailing Pulley

The Ronstan RF55111 is a rugged, high-performance 55mm single block with integrated becket, designed for medium to heavy-load control systems on keelboats, dinghies, and performance yachts. Part of the reliable Ronstan Series 55, this block delivers smooth, efficient operation and exceptional durability in demanding marine environments.

The UV-stable acetal sheave ensures low-friction line handling, while the becket provides a convenient tie-off point in multi-purchase setups such as vangs, cunninghams, or outhauls. Finished with 316 stainless steel cheeks, the RF55111 stands up to salt, sun, and stress for long-term performance.

✅ Key Features

• • Ronstan RF55111 – 55mm single block with becket

  • Becket for tie-off in purchase systems

  • UV-resistant acetal sheave for smooth operation

  • 316 stainless steel cheeks for corrosion resistance

  • Medium to heavy load-rated for keelboats and performance yachts

  • Ideal for control lines, vang systems, outhauls, and mainsheets

  • Lightweight, strong, and compact

  • Part of the Ronstan Series 55 block range

Ronstan RF55111 55mm Single Pulley with becket specifications:

• Sheave Ø 55 mm
• Max. Rope Ø 10 mm
• Max. Cable Ø - mm
• Pin Ø - mm
• M.W.L. 500 kg
• B. L. 1000 kg
• Weight 75 g