Ronstan RF104110 Core 100mm Pulley with Becket | High-Load Ball Bearing Block

The Ronstan RF104110 is a heavy-duty Core 100mm ball bearing pulley with an integrated becket, engineered for high-load, performance sailing applications. Designed for use on racing yachts, keelboats, and larger cruisers, this block delivers exceptional strength, durability, and ultra-smooth operation.

Part of the Ronstan Core Series, it features high-efficiency ball bearings, lightweight alloy cheeks, and a UV-stable acetal sheave, making it ideal for critical systems such as mainsheets, halyards, vangs, and runner systems. The becket allows for easy line termination or multi-part purchase setups.

✅ Key Features

• Ronstan RF104110 – 100mm pulley block with becket

• High-load ball bearing system for smooth operation

• Core Series construction with alloy cheeks and acetal sheave

• Becket for tie-off in purchase and control systems

• Lightweight yet extremely strong and corrosion-resistant

• Ideal for mainsheets, halyards, runners, and vangs

• Built for offshore, performance cruising, and race boats

• Premium Ronstan hardware designed for professional use

Ronstan RF104110 Core 100mm Ball Bearing Pulley with Becket Specifications:

• Type of Block    Single
• B.L. (kg)    7500
• M.W.L. (kg)    3250
• Max. Rope diameter (mm)    18
• Weight (g)    1098
• Pin Ø (mm)    10