Our Price only $68.49 .

Lewmar 90mm Synchro Blocks Block Footblock 4400lb. Swl 15.2oz. . Lewmars Synchro blocks are more efficient less expensive Lewmars Synchro blocks combine geometry sheave ratios and a unique free spin bearing to deliver performance that s comparable to ball and roller bearing blocks used in pro racing 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 on conventional blocks. For best performance use the line sizes marked on sheaves. Synchro blocks improve efficiency by nearly 5 on a single block at a load of 442lb 200kg. Calculated over a typical six-block mainsheet system this approaches a 40 improvement over conventional blocks. This new range of blocks transforms performance not only by improving efficiency but also speed and handling. Optimized block geometry a revolutionary free spin bearing and a self-aligning head combine to reduce friction. Each component is synchronized with the movement of the line providing an easier smoother transfer of power from deck to sail and all with less line wear. Sheave Reinforced plastic Ball Bearings Free spin Sheave Size 2 50mm 2.4 60mm 2.88 72mm 3.6 90mm 4.2 105mm Line Dia. 918 Cheek MaterialFinish Stainless steel and plastic ShackleStrap Type 15 swivel

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