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Lewmar - Synchro blocks (footblocks)


Lewmar Synchro blocks are engineered for speed, efficiency and superior handling. Using 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.

Price:  £38.00
RRP:  £41.65
Save:  £3.65 (9%)
(Inc. VAT @ 20%)(£31.67 Exc. VAT)

Article Number:  29926061BK

Synchro Footblocks feature alloy cheeks, fixing isolators and a moulded base plate to prevent sealant ingress into the sheave.


  • Standard and jammer options can be double stacked
  • Two-step jammer action keeps lever close to side of the block
  • Optimised jammer shape holds line central on the sheave
  • Tough alloy cheeks
  • Synchro sheave loads match the same sized blocks
  • Twin fixings with inserts
  • Wide head for a solid base, block will not “roll” on the deck
  • Moulded base plate with recess to hold sealant around fixing screws and prevent ingress onto the bearing and sheave
HTX blocks - Footblock
Sheave Jammer Working load Max line Shackle pin Weight
40mmØ single - 750kg 6mmØ (optimum)
10mmØ (optimum)
4mmØ 66g
40mmØ double - 750kg 6mmØ (optimum)
10mmØ (optimum)
4mmØ 121g
60mmØ - 800kg 8mmØ (optimum)
10mmØ (optimum)
5mmØ 162g
With jammer 800kg 8mmØ (optimum)
10mmØ (optimum)
5mmØ 190g
72mmØ - 1,100kg 10mmØ (optimum)
12mmØ (optimum)
6mmØ 229g
With jammer 1,100kg 10mmØ (optimum)
12mmØ (optimum)
6mmØ 250g
90mmØ - 2,000kg 12mmØ (optimum)
14mmØ (optimum)
9.8mmØ 672g

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