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12:1 GP catamaran mainsheet system

Part No. 2800

Maximum line Ø (mm) 8 mm

Maximum line Ø (in) 5/16 in

Maximum working load (kg) 545 kg

Maximum working load (lb) 1200 lb

Harken’s Grand-Prix mainsheet systems are critically important options for high-performance beachcats like the Nacra 17 or F18s. The high-efficiency blocks making up these systems feature insert-molded ceramic bearings that almost eliminate rolling resistance, greatly improving power transfer to the crew for easy, precise trimming. These compact blocks feature hardcoat-anodized sideplates that envelop composite sheaves for easy disassembly/reassembly. The system profile is the lowest on the market by far. High-performance fairing increases aerodynamic flow and protects the crew and blocks from impact damage. The lower block features a built-in cam arm that infinitely adjusts by loosening two (2) screws with a hex key. A single ratchet sheave in the bottom block ensures release is controlled and smooth. A snap shackle attaches the block to the boom. A swivel shackle attaches to the traveler. Note: the GP mainsheet system is delivered as a 12:1 mainsheet system, but can be easily reconfigured as a 10:1 or an 11:1 to align with wind or crew preference. All necessary parts and reeving instructions are included. Line not included.
Sheave Ø (mm)59 mm
Sheave Ø (in)2 5/16 in
Pin-to-pin length (mm)224 mm
Pin-to-pin length (in)8 13/16 in
Weight (g)1039 g
Weight (oz)36.6 oz
Maximum line Ø (mm)8 mm
Maximum line Ø (in)5/16 in
Maximum working load (kg)545 kg
Maximum working load (lb)1200 lb
Breaking load (kg)1636 kg
Breaking load (lb)3600 lb