Lewmar 30mm Synchro Block With Stainless Steel Sheave Bk

MSRP: $30.01
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0.50 LBS
Calculated at Checkout
30 mm
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Ideal for use with hand-held loads, Lewmar’s Control Blocks feature lightweight, performance load-bearing capacity. MRT (Metal Replacement Technology) and a stainless steel central race and balls provide a weight advantage, while Long Fibre Technology offers exceptional strength and durability. The open design allows sand and salt to be flushed out easily, keeping maintenance simple.


  • Designed for use with wire - 30mm suits max 3mm (1/8") wire; 40mm suits max 6mm (1/4") wire
  • Lightweight
  • Very High Strength
  • Impact Resistant
  • Reduced Friction
  • Easy Maintenance
  • Optimised for hand control


Ball bearing blocks are typically used for medium and dynamic loads in:

  • Control line applications
  • Mainsail sheets for dinghies and keelboats
  • Spinnaker sheets, barber haulers
  • Genoa sheets
  • Dinghy applications

Manufacturer part #: 29901301BK

Technical Description
528 lb
240 kg
1056 lb
480 kg
2- 1/8 in
54 mm
1.2 oz
36 g
2/7 in
7.1 mm
1/6 in
4 mm
Lewmar Control Blocks