Windsurfing masts

6 months ago
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Gestalt
Gestalt
QLD
15067 posts
QLD, 15067 posts
25 Oct 2026 10:06am
jn1 said..
geoITA: When you measured, did you measure each mast once only ?. Or did you do multiple measurements of the same mast and calculate an average ?. What length of time period did you perform these measurements for each mast ?. Did you measure the masts to make sure they were the correct length ?. Was there a large temperature variation when you performed these measurements ? (eg: a cold clouding morning, then a day later on a hot sunny day with the mast sitting in the sun). Would be interesting to see the spread under same environmental conditions.

Gestalt: I think Slake masts are the only windsurfing product I know that uses a quality assurance standard (their web site is down at the moment, I can't check). But if a brand/product has no quality assurance (this is not just windsurfing), then I assume nothing.



Agree.

It’s great that slake offer that. I know of one brand that used to do the qa themselves but with new owners not sure if that still happens. This is what I think should be going on with all brands. It’s also worth noting that while this thread focusses on masts the sails also have tolerances and in some cases it’s the sail and not the mast. Or a combination which is why pro’s measure and test multiple masts and sails. It’s harder to build sails in tolerance.
lemat
lemat
233 posts
233 posts
26 Oct 2026 3:09pm
My Wicked should be rig with Venom mast i ask s2maui about of my xo mast they explain that their constant curve mast is stiffer top and flexier base than mine.
2021 bendcurve from builders:
S2 between 11 and 13
Gasails 13
Kasails 13.5
Gunsails 14
Xo/Simmer same mast CC flex top
Gestalt
Gestalt
QLD
15067 posts
QLD, 15067 posts
27 Oct 2026 8:34am
lemat said..
My Wicked should be rig with Venom mast i ask s2maui about of my xo mast they explain that their constant curve mast is stiffer top and flexier base than mine.
2021 bendcurve from builders:
S2 between 11 and 13
Gasails 13
Kasails 13.5
Gunsails 14
Xo/Simmer same mast CC flex top


I’ve been trying to find the simmer numbers for ages. Can’t find anything online. Will probably need to measure my own simmer masts. Have not needed to do that because i use simmer masts in simmer sails and my sails generally are pretty good once rigged. However, it would be good to get the numbers to add to the list.
lemat
lemat
233 posts
233 posts
27 Oct 2026 2:37pm
Gestalt said..

lemat said..
My Wicked should be rig with Venom mast i ask s2maui about of my xo mast they explain that their constant curve mast is stiffer top and flexier base than mine.
2021 bendcurve from builders:
S2 between 11 and 13
Gasails 13
Kasails 13.5
Gunsails 14
Xo/Simmer same mast CC flex top



I’ve been trying to find the simmer numbers for ages. Can’t find anything online. Will probably need to measure my own simmer masts. Have not needed to do that because i use simmer masts in simmer sails and my sails generally are pretty good once rigged. However, it would be good to get the numbers to add to the list.


I can't find numbers for simmer/xo sails too. Only they are same build/bend constant curve flex top.
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