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High Tech Line

High Tech Sailing Line

For sailboat racing, high tech line that is durable and offers minimal stretch isn't an option, it's a requirement. West Coast Sailing offers a range of high tech line options including Samson Ultra-Lite, Alpha Ropes SSR, Robline Dinghy Control, Marlow Excel Racing, and Robline Coppa 500. These lines have a strong, low stretch Spectra or Dyneema core with a durable cover.

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  • 10mm Marlow D2 Racing Line

    10mm Marlow D2 Racing

    Marlow Ropes

    $3.38
    The pre-stretched, bio-based D12 78 core makes Marlow D2 Racing a high-strength, lightweight all-round performer. It is color coded with the cover ensuring identification is assured even if the cover is stripped. Upgrade polyester halyards with D2 Racing...
    Qty in Cart: 0
    Price:
    $3.38
    Subtotal:
  • 8mm Marlow D2 Racing

    8mm Marlow D2 Racing

    Marlow Ropes
    $2.65
    The pre-stretched, bio-based D12 78 core makes Marlow D2 Racing a high-strength, lightweight all-round performer. It is color coded with the cover ensuring identification is assured even if the cover is stripped. Upgrade polyester halyards with D2 Racing...
    Qty in Cart: 0
    Price:
    $2.65
    Subtotal:
  • 5mm Marlow Excel Control

    5mm Marlow Excel Control

    Marlow Ropes
    $0.88
    Marlow Excel Control was the first first and remains best dedicated line for continuous loop dinghy control lines. The special snakeskin pattern means end-to-end, endless loop splicing with no diameter increase is much easier. Technora cover provides...
    Qty in Cart: 0
    Price:
    $0.88
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  • 4mm Marlow Excel Control

    4mm Marlow Excel Control

    Marlow Ropes
    $0.55
    Marlow Excel Control was the first first and remains best dedicated line for continuous loop dinghy control lines. The special snakeskin pattern means end-to-end, endless loop splicing with no diameter increase is much easier. Technora cover provides...
    Qty in Cart: 0
    Price:
    $0.55
    Subtotal:
  • 6mm Marlow Excel Racing GP78

    6mm Marlow Excel Racing GP78

    Marlow Ropes
    $2.42
    Marlow Excel Racing GP78 is a high performance dinghy and keelboat control line. The SK78 core is high strength and minimal creep and the Technora blended cover gives fantastic abrasion and heat resistance. The cover also adds grip for wet hands, and is...
    Qty in Cart: 0
    Price:
    $2.42
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  • 5mm Marlow Excel Racing GP78

    5mm Marlow Excel Racing GP78

    Marlow Ropes
    $1.90
    Marlow Excel Racing GP78 is a high performance dinghy and keelboat control line. The SK78 core is high strength and minimal creep and the Technora blended cover gives fantastic abrasion and heat resistance. The cover also adds grip for wet hands, and is...
    Qty in Cart: 0
    Price:
    $1.90
    Subtotal:
  • 4mm Marlow Excel Racing GP78

    4mm Marlow Excel Racing GP78

    Marlow Ropes
    $1.19
    Marlow Excel Racing GP78 is a high performance dinghy and keelboat control line. The SK78 core is high strength and minimal creep and the Technora blended cover gives fantastic abrasion and heat resistance. The cover also adds grip for wet hands, and is...
    Qty in Cart: 0
    Price:
    $1.19
    Subtotal:
  • 8mm Marlow Excel Fusion

    8mm Marlow Excel Fusion

    Marlow Ropes
    $2.26
    Marlow Excel Fusion is a high performance line featuring a blended Dyneema and Polypropylene cover, ensuring no water absorption, great abrasion resistance through ratchets and cleats, and a soft feel in the hand. The Dyneema SK78 core provides...
    Qty in Cart: 0
    Price:
    $2.26
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  • 7mm Marlow Excel Fusion

    7mm Marlow Excel Fusion

    Marlow Ropes
    $1.82
    Marlow Excel Fusion is a high performance line featuring a blended Dyneema and Polypropylene cover, ensuring no water absorption, great abrasion resistance through ratchets and cleats, and a soft feel in the hand. The Dyneema SK78 core provides...
    Qty in Cart: 0
    Price:
    $1.82
    Subtotal:
  • 8mm Maffioli Swiftcord

    8mm Maffioli Swiftcord

    Kingfisher Yacht Ropes

    $1.98
    Gottifredi Maffioli Swiftcord from Kingfisher Ropes is lightweight, strong, durable, comfortable to hold in your hands. Made popular by Olympic dinghy sailors, Swiftcord is a favorite among many active sailors. It is a hollow braid construction with an...
    Qty in Cart: 0
    Price:
    $1.98
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  • 7mm Maffioli Swiftcord

    7mm Maffioli Swiftcord

    Kingfisher Yacht Ropes
    $1.60
    Gottifredi Maffioli Swiftcord from Kingfisher Ropes is lightweight, strong, durable, comfortable to hold in your hands. Made popular by Olympic dinghy sailors, Swiftcord is a favorite among many active sailors. It is a hollow braid construction with an...
    Qty in Cart: 0
    Price:
    $1.60
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  • 6mm Maffioli Swiftcord

    6mm Maffioli Swiftcord

    Kingfisher Yacht Ropes
    $1.17
    Gottifredi Maffioli Swiftcord from Kingfisher Ropes is lightweight, strong, durable, comfortable to hold in your hands. Made popular by Olympic dinghy sailors, Swiftcord is a favorite among many active sailors. It is a hollow braid construction with an...
    Qty in Cart: 0
    Price:
    $1.17
    Subtotal:
  • 4mm Robline Coppa 5000 Line 4mm Robline Coppa 5000 Line

    4mm Robline Coppa 5000 Line

    Robline
    $1.03
    Robline Coppa 5000 is a great high performance line for sheeting on larger dinghies and keelboats. It has a Dyneema SK-78 core and provided with a 24-plait cover for easy splicing and stripping. It is ideal for applications where minimum stretch and...
    Qty in Cart: 0
    Price:
    $1.03
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  • 5mm Robline Dinghy PolyTech

    5mm Robline Dinghy PolyTech

    Robline
    $2.41
    The Dinghy PolyTech from Robline is an easy-to-splice control line with a Technora cover and is ideally suited for use on skiffs and dinghies. This is our line of choice in our upgraded ILCA control systems and other dinghy controls...
    Qty in Cart: 0
    Price:
    $2.41
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  • 4mm Robline Dinghy PolyTech

    4mm Robline Dinghy PolyTech

    Robline
    $1.27
    The Dinghy PolyTech from Robline is an easy-to-splice control line with a Technora cover and is ideally suited for use on skiffs and dinghies. This is our line of choice in our upgraded ILCA control systems and other dinghy controls...
    Qty in Cart: 0
    Price:
    $1.27
    Subtotal:
  • New England Ropes Nexus Pro

    7mm New England Ropes Nexus Pro

    New England Ropes
    $1.99
    Nexus Pro by New England Ropes has been developed in cooperation top sailors. Nexus Pro has a durable, lightweight cover that offers excellent grip and holding power. The core is pure Dyneema for ultra-strength and low-stretch. Colors: Blue,...
    Qty in Cart: 0
    Price:
    $1.99
    Subtotal:
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Finding The Right Diameter

If you are replacing an existing line, the easiest way to determine what diameter you need is to match what you already have. This can be done with a caliper or by close estimation with a tape measure. If you've previously used a 7mm sheet and it has performed well, another 7mm line is likely a great choice. In most applications, there is some flexibility in the exact diameter that can be used. Most blocks, for example, have an 'ideal' diameter (ie, the line diameter that runs most effectively though the block's sheave) but also have a range so that you can run a slightly thinner or slightly thicker line. If you have a sheet that is getting hung up in your rig, stepping down 1-2mm might help the sheet run more efficiently. If you have a larger boat or rig and want to run a thinner sheet, consider a double braid line that features a Dyneema or spectra core for strength.

Line Diameter Conversion

1mm = 3/64 inch | 2mm = 5/64 inch | 3mm = 1/8 inch

4mm = 5/32 inch | 5mm = 3/16 inch | 6mm = 1/4 inch

7mm = 9/32 inch | 8mm = 5/16 inch | 9mm = 3/8 inch

10mm = 25/64 in | 11mm = 7/16 in  | 12mm = 1/2 in

Double Braid vs Single Braid

Two terms you will often see in line descriptions are 'double braid' and 'single braid', which refer to the way the line is constructed. At the most basic level, a double braid line has a cover and a core whereas a single braid does not, but there are other important distinctions to consider when making a line selection.

Single Braids are made up of either 8 or 12 strands that are braided into a circular pattern, half clockwise and half counter clockwise. This produces a line that is supple, absorbs twists, and tends not to kink. There are two types of single braid lines: performance single braids and polyester/blended single braids. Performance single braids are made from fibers with very low stretch and designed to handle extreme loads - think Dyneema, Spectra, or Vectran. Polyester/blended single braids, sometimes called hollow braid, are soft and easy to grip, built for sheets and hand-adjusted control lines. These are less common than performance single braid lines but recommended in a few specific applications.

Double Braids, sometimes called braid on braid, have a braided core within a braided outer jacket or cover. This creates a strong, durable, smooth-running line that is easy to handle. Double braids are used for the vast majority of all running rigging on sailboats including sheets, halyards and control lines for both cruising or racing. There are two types to consider: polyester double braids and high-tech double braids. Polyester double braids, found most commonly on recreational and cruising sailboats, have a polyester cover with polyester core. These are low maintenance, affordable, and long-lasting, while offering relatively low stretch and high working loads. For additional strength and minimal stretch, consider high-tech double braids. These lines typically feature a Dyneema or Spectra core (non-stretch) inside a polyester or polyester/dyneema blend cover for additional durability. They are more expensive but often the go to choice for high performance racing boats.

Whipping & Splicing

Looking to clean up the end of your line or need to add a splice to your rig? Visit our Whipping & Splicing page for a full selection of whipping twine, fids, splicing needles, and complete splicing kits. Perfect for the DIY sailor looking to further optimize their rigging.

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