The Lewmar 29929001BK is a 90mm Synchro Single Block engineered for speed, efficiency, and superior handling in sailing applications. Designed for mainsheet and vang systems, halyards, halyard tuning systems, and masthead blocks, this plain bearing block delivers performance comparable to ball and roller bearing blocks used in racing.
Lewmar's Synchro Block uses scientifically optimized block geometry combined with a free-spin bearing and self-aligning head to reduce friction and increase efficiency by up to 40% over standard blocks on mainsheet systems. Every component is synchronized with the movement of the rope, ensuring a smoother, easier transfer of power from deck to sail while minimizing rope wear.
Key Features:
- Stainless steel strap for improved strength and longer service life
- Stiff glass fiber reinforced cheeks to prevent lines from wedging
- Free-spin bearing with self-aligning head reduces friction significantly
- Innovative "tool-free" sliding swivel locking mechanism — easily switch between swiveling and fixed shackle
- Scientifically optimized block geometry for maximum efficiency
- Synchronized movement from rope to sail for smooth power transfer
- Reduces rope wear compared to conventional blocks
Technical Specifications:
- Sheave Diameter: 90mm
- Maximum Line Size: 9/16"
- Safe Working Load (SWL): 4,400 lbs
- Color: Black
- UPC: 743683203862
Ideal for halyard tuning, mainsheet systems, mast foot blocks, masthead blocks, and boom vang setups, the Lewmar Synchro Single Block is a reliable, high-performance choice for cruising and performance sailors alike.
