The Lewmar 60mm Double Becket Synchro Block is engineered for speed, efficiency and superior handling. We use a combination of scientifically optimised block geometry, a Free-Spin bearing and self-aligning head to reduce friction and increase efficiency by up to 40% over budget blocks on mainsheet systems.

Each component is perfectly synchronised with the movement of the rope, providing you with an easier, smoother transfer of power from deck to sail and less wear on your rope.


  • Stainless steel strap for improved strength and longer service life
  • Stiff glass fibre reinforced cheeks to prevent lines from wedging
  • Innovative design with “tool-free” sliding swivel locking mechanism
  • Simple switch to change from swivelling to fixed shackle
Plain bearing blocks are typically used for heavy and static loads in:
  • Halyard tuning
  • Mainsheet systems
  • Mast foot blocks
  • Mast head blocks
  • Boom vang

Part Number:  29926005BK


Part No Sheave Diameter Load Limit Weight
29925005BK 50mm 450kg
(990 lb)
(5.77 oz)
29926005BK 60mm 800kg
(1760 lb)
(9.19 oz)
29927205BK 72mm 1100kg
(2420 lb)
(14.61 oz)

Part Number: 29926005BK

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Lewmar 60mm Double Becket Synchro Block
Original Price: $ 68.19
Price: $ 41.12

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