The Lewmar 60mm Fiddle Becket Synchro Block is engineered for speed, efficiency and superior handling. Lewmar uses 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:  29926034BK


Part No Sheave Diameter Block Load Limit Weight
29925034BK 50mm 450kg
(990 lb)
(3.45 oz)
29926034BK 60mm 800kg
(1760 lb)
(5.85 oz)
29927234BK 72mm 1100kg
(2420 lb)
(9.70 oz)
29929034BK 90mm 2000kg
(4400 lb)
(20.77 oz)

Part Number: 29926034BK

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Lewmar 60mm Fiddle Becket Synchro Block
Original Price: $ 49.96
Price: $ 39.09
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