$92.99

Lewmar 90mm Synchro Block, Toghead Halyard Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of [...]. 
$16.99

These blocks have 30 holes and are one inch thick. Instead of finger grooves like our other blocks, the BMG blocks have stepped handles on each end for ease in moving the block. 
$99.99

Laser Performance Laser Boom & Traveler Block Set At last, Harken ball bearing blocks for your Lasers mainsheet system! Boom blocks and upper traveler block feature ball bearings for rapid trims and quick eases on the sheet as you round the top mark. Onepiece traveler block does away with messing with Brummel hooks and shrink wrap. To install the boom blocks, just remove both eye straps by drilling out the rivets, then replacing them with your new blocks installed. Sold as a complete kit, or individually. 
$19.99

Lewmar 50mm Synchro Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculated over [...]. 
$24.99

Laser Performance Laser Aft Boom Block with Becket At last, Harken ball bearing blocks for your Lasers mainsheet system! Boom blocks and upper traveler block feature ball bearings for rapid trims and quick eases on the sheet as you round the top mark. Onepiece traveler block does away with messing with Brummel hooks and shrink wrap. To install the boom blocks, just remove both eye straps by drilling out the rivets, then replacing them with your new blocks installed. Sold as a complete kit, or individually. 
$22.99

Laser Performance Laser Forward Boom Block At last, Harken ball bearing blocks for your Lasers mainsheet system! Boom blocks and upper traveler block feature ball bearings for rapid trims and quick eases on the sheet as you round the top mark. Onepiece traveler block does away with messing with Brummel hooks and shrink wrap. To install the boom blocks, just remove both eye straps by drilling out the rivets, then replacing them with your new blocks installed. Sold as a complete kit, or individually. 
$182.99

Lewmar 90mm Synchro Double Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$54.99

Laser Performance Laser Traveler Blocks At last, Harken ball bearing blocks for your Lasers mainsheet system! Boom blocks and upper traveler block feature ball bearings for rapid trims and quick eases on the sheet as you round the top mark. Onepiece traveler block does away with messing with Brummel hooks and shrink wrap. To install the boom blocks, just remove both eye straps by drilling out the rivets, then replacing them with your new blocks installed. Sold as a complete kit, or individually. 
$57.99

Lewmar 72mm Synchro Fiddle Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$122.99

Lewmar 72mm Synchro Triple Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$122.99

Lewmar 90mm Synchro Block  Fiddle Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calcul [...]. 
$107.99

Lewmar 72mm Synchro Block, Fiddle Cam Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Cal [...]. 
$84.99

Lewmar 72mm Synchro Double Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$82.99

Lewmar 60mm Synchro Fiddle Block with Cam Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. [...]. 
$79.99

Lewmar 60mm Synchro Triple Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$67.99

Lewmar 50mm Synchro Block with Becket and Cam Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 44 [...]. 
$57.99

Lewmar 50mm Synchro Triple Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$54.99

Lewmar 60mm Synchro Double Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$54.99

Lewmar 50mm Synchro Fiddle Block with Cam Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. [...]. 
$40.33

Lewmar 72mm Synchro Halyard Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calcula [...]. 
$39.99

Lewmar 50mm Synchro Double Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$38.99

Lewmar 60mm Synchro Fiddle Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$31.99

Lewmar 50mm Synchro Fiddle Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$25.99

Lewmar 60mm Synchro Halyard Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calcula [...]. 
$22.99

Lewmar 50mm Synchro Block with Becket Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Cal [...]. 
$97.99

Lewmar 90mm Synchro Single Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$18.99

Lewmar 50mm Synchro Halyard Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calcula [...]. 
$42.99

Lewmar 72mm Synchro Single Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 
$27.99

Lewmar 60mm Synchro Single Block Synchro blocks combine geometry, sheave ratios and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing, but at a more affordable price. With conventional blocks, one of the biggest losses in efficiency comes from the distortion of line as it wraps around the sheave. Synchro blocks provide the optimal ratio between line size, sheave diameter and the interface between rope and sheave. The result is larger sheaves with a smaller axle than exist on conventional blocks. Synchro blocks improve efficiency by nearly 5% on a single block at a load of 442lb. Calculat [...]. 