Ronstan RF55101 55mm Single Block | Series 55 Stainless Sailing Pulley

The Ronstan RF55101 is a high-strength 55mm single pulley block, engineered for medium to heavy-duty rigging applications. Ideal for use on keelboats, dinghies, and performance yachts, this block is part of the Ronstan Series 55, offering precision line handling and rugged durability in a compact form.

Constructed with UV-resistant acetal sheaves and 316 stainless steel cheeks, the RF55101 delivers smooth, low-friction operation under load. It’s perfect for vangs, sheets, outhauls, and other control lines where consistent, efficient performance is essential.

✅ Key Features

• • Ronstan RF55101 – Single 55mm pulley block

  • UV-resistant acetal sheave for smooth, low-friction use

  • 316 stainless steel cheeks for corrosion resistance and strength

  • Lightweight, strong, and compact design

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

  • Built for keelboats, racing yachts, and high-performance applications

  • Part of the Ronstan Series 55 range

  • Long-lasting, low-maintenance sailing hardware

Ronstan RF55101 55mm Single Pulley 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 68 g