Welcome to the UKWA Home Page Forums Technical 2mm or 3mm wire

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  • #3712

    Hi All

    I’m just about to alter my rope main halyard to a wire one. I was planning to use 2mm wire until I saw someone on ebay advertising 3mm wire main halyards for Wayfarers.

    Which wire size should I use?




    I used to have a wire halliard and it was ok when all I used to do was race. now I use 5mm dyneema and haven’t noticed it stretching. 5mm is well over the strength you need but I chose 5mm for ease of handling. If you have your halliard too long it also means that you can chop a bit off after a season or two to extend its life.

    Colin Parkstone


    3mm wire for a main halyard is way over the top and will not like turning the top sheave, 2mm or 2.5mm (7×19) at the most for main halyards and 4mm three strand pre stretch as a tail so you can do an eye splice in the end.

    3mm 7×19 is used for genoa halyards and 3mm 1×19 for shrouds, stainless of course,dont get fobbed of with galvanised.

    C P 🙂

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