SailNet Community

SailNet Community (
-   Learning to Sail (
-   -   What size lines to use on my sailboat? (

Christo Bas 02-20-2012 10:07 PM

What size lines to use on my sailboat?
Hello! I recently purchased a 1967 Islander Bahama 24. She is beautiful, but needs to have most all lines installed. How do I decide what diameter/what type of lines to get? Thanks for your help!

St Anna 02-21-2012 05:11 AM

Well, I would go as big a diameter as will fit through the sheaves. Thin lines may be plenty strong enough but will shred your hands. So I would say use 10mm if possible or 8 mm if 10 mm is too big. 12mm is nicer but will definetely be too thick to fit.


HUGOSALT 02-21-2012 09:40 AM

Echo St Anna...Welcome aboard and enjoy your new love!

mananamon 02-21-2012 10:37 AM

Hi and welcome aboard.

You may want to talk to a shop that sells running rigging as there is more to it than just diameter. Different types of line have different strengths and strech ratios. I recently replaced all my 3/8" diameter halyards with 5/16" lines made of Dyneema which has higher ultimate strength and less strech than the old lines. West Marine has a pretty good guide to lines in their catalog that would give you a pretty good place to start.

St Anna is right too, you have to use a diameter that will fit the sheeves too.

HPLou 02-21-2012 11:30 AM

My previous boat was an '67 Islander Bahama 24. I believe the halyards were 3/8" rope attached to 3/16" wire. You should check the sheaves to verify the size wire or rope they will handle.

Barquito 02-21-2012 01:33 PM

Low stretch line more important on halyards than on sheets. Hand-feel (line size, fuzziness, etc) more important on sheets than on halyard, unless you tune your halyard a lot.

Christo Bas 02-26-2012 04:16 PM

Thanks for all the help, everyone! I'm sure I'll have lots more questions as we roll along..


zz4gta 02-26-2012 05:07 PM

What you need, is nothing more than 1/4" diameter. What feels good in your hand is up to you and your crew. I use line from 7/64th to 3/8th on my 25 footer, but most of that has to do with low stretch and low weight. If you're not concerned with that, then buy a spool of 3/8th sta-set and be done with it. Use it for the whole boat. Not a great line, but it works.

sck5 02-26-2012 06:20 PM

Mauri pro has lots of on-line calculators and guides. Useful for an overall view of what you might want and what options there are.

arisatx 02-26-2012 10:10 PM


Originally Posted by sck5 (Post 837075)
Mauri pro has lots of on-line calculators and guides. Useful for an overall view of what you might want and what options there are.


Like skc5 said:

Mauri Pro calculator

All times are GMT -4. The time now is 04:18 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
(c) LLC 2000-2012

For the best viewing experience please update your browser to Google Chrome