This 4:1 tackle is the most common on boats under 28' (8.5m).

Boats with mainsails up to 375 sq ft (35 sq m) often use a 6:1 system.

This 8:1 purchase handles high mainsheet loads on Beachcats up to 20' (6m).

Position the swivel base off the and block off the traveler car to allow mainsail adjustment without dragging the car to windward in light air. To avoid tightening the leech, curve the track ends up. See Hardware > Harken Traveler Components for more information on curving track.

This 6:1/24:1 cascading system is used on boats with end-boom sheeting and mains as large as 275 sq ft (25.5 sq m).

This powerful gross-tune/fine-tune cascading system allows crew to use the 4:1 gross-trim for most trimming and the 16:1 fine-tune for precise adjustments.

This 4:1/16:1 system uses a dinghy-like double-ended tackle that locates the sheet ends on the cockpit sides.

Install the fine tune system in the boom to stop the leech from tightening as the car moves off centerline--often a problem in external fine-tune systems. It also cleans up the cockpit.

This system moves the traveler over the companionway to clean up the cockpit. A favorite on many cruising boats.

This system is popular on cruising boats with cabintop travelers. The sheet leads forward to the gooseneck and then down and back to a winch on the aft edge of the cabintop.

This simple double-ended system lets the mainsheet run freely through the blocks which allows the traveler car to move easily. The trimmer makes sail adjustments from the high side.

In this system the traveler is independent of the mainsheet so it rolls freely. The sheet leads forward along the boom before it turns down and aft to winches. Used on race boats like the Farr 40.

Many large boats use this simple 2:1 system. A block on deck turns the sheet to a winch.

This system is often found on boats like J/24s where a center-mounted swivel base is desired.

This 3:1/6:1 two-speed system is used on boats with end-boom sheeting and mainsails up to 240 sg ft (22.3 sq m).

This 3:1/6:1 system allows the mainsheet trimmer to be positioned anywhere on the boat. A great setup for sportboats.

Similar to the 3:1/6:1 Two-Speed Swivel Base Mainsheet System, but uses a 4:1/8:1 tackle for more power.

This 6:1/24:1 system is used on boats with mains as large as 275 sq ft (25.5 sq m) and end boom sheeting.

Two-speed mainsheet systems allow both coarse and fine tuning in a single purchase system. When sailing upwind trim with one sheet and leave the other cleated. Blow both at the weather mark or haul on both at the leeward to be quicker around the corners. Ratcheted sheaves on cleated block provide the trimmer greater control.

75mm/50mm sheaves for 3/8" to 1/2" line diameter. Use on sportboats or keelboats with end boom sheeting and sail area up to 42 square meters (452 square feet) or mid-boom sheeting and sail area up to 27 square meters (290 square feet). RF72900 kit consists of one each of RF72900B and RF72900T. Line not included with kits..

Two-speed mainsheet systems allow both coarse and fine tuning in a single purchase system. When sailing upwind trim with one sheet and leave the other cleated. Blow both at the weather mark or haul on both at the leeward to be quicker around the corners. Ratcheted sheaves on cleated block provide the trimmer greater control.

75mm/50mm sheaves for 3/8" to 1/2" line diameter. Use on sportboats or keelboats with end boom sheeting and sail area up to 38 square meters (409 square feet) or mid-boom sheeting and sail area up to 23 square meters (248 square feet). RF72700 kit consists of one each of RF72700B and RF72700T. Line not included with kits..