Small fin risks

Friday
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Jasonwave
Jasonwave
163 posts
163 posts
29 May 2026 12:10am
Hello

i am looking at my Futura 100L/63 wide and wondering what might happen to me if I attempt an afternoon of speed runs with a much smaller fin.


its spec’d for 32 fin with a 6/6,4 m sail for my 80kg and runs nicely at around 30-33 knots peak with a Rhino Pro in flat water but I am no speed expert yet.

what do I risk if I put a 26 Black Project Speed fin on it this weekend, as am expecting 25-30 knts of wind. Butter flat water.


not worried about getting back upwind, can walk if have to.

but am worried about the 2 hr drive back home if I F-up.

stupid or go for it ?
John340
John340
QLD
3414 posts
QLD, 3414 posts
29 May 2026 5:26am
Jasonwave said..
Hello

i am looking at my Futura 100L/63 wide and wondering what might happen to me if I attempt an afternoon of speed runs with a much smaller fin.


its spec’d for 32 fin with a 6/6,4 m sail for my 80kg and runs nicely at around 30-33 knots peak with a Rhino Pro in flat water but I am no speed expert yet.

what do I risk if I put a 26 Black Project Speed fin on it this weekend, as am expecting 25-30 knts of wind. Butter flat water.


not worried about getting back upwind, can walk if have to.

but am worried about the 2 hr drive back home if I F-up.

stupid or go for it ?


Try a 27 Tribal Weed Speed
choco
choco
SA
4186 posts
SA, 4186 posts
29 May 2026 6:31am
No problem, just need to load the fin slowly and once up to speed the board will fly off the wind, only negative is you won't point as high and will let go in chop if too back foot heavy.
kato
kato
VIC
3530 posts
VIC, 3530 posts
29 May 2026 2:31pm
26 no issues, when the topic said small fin I was thinking below 20. Your only concern will be jibing as the fin might pop out mid turn
ka43
ka43
NSW
3105 posts
NSW, 3105 posts
29 May 2026 5:54pm
As Choco said. At Budgy I use a 19cm weedy on a 99 ltr board. Its usually pretty flat but you lose upwind ability.
Or a 25cm weedy if a bit lighter.
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