Fin sizing for twin

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2 months ago

General Gps & Speed Waves Foiling Gear Reviews Lost & Found WA NSW QLD SA VIC TAS

AI.Dave

TAS

159 posts

AI.Dave

TAS, 159 posts

10 Mar 2026 5:49pm

i've an old 71l starboard evo IQ which i've only ever used as a single fin setup. Great fun to ride, light fast and responsive

Would 14.5cm be too small for the twin setup? 4.7 to 4.2 weather for DTL

Can try and see but just want to be in the ball park so i dont spend my sess swapping fins

Muppet

124 posts

Muppet

WA, 124 posts

10 Mar 2026 3:46pm

AI.Dave said..
i've an old 71l starboard evo IQ which i've only ever used as a single fin setup. Great fun to ride, light fast and responsive

Would 14.5cm be too small for the twin setup? 4.7 to 4.2 weather for DTL

Can try and see but just want to be in the ball park so i dont spend my sess swapping fins

I think that board was stocked with twin 15cm, so 14.5cm will be fine if you're not too heavy.

AI.Dave

TAS

159 posts

AI.Dave

TAS, 159 posts

10 Mar 2026 8:38pm

thanks! i'll give it a go

Rango

853 posts

Rango

WA, 853 posts

10 Mar 2026 7:25pm

If they have a wide base they should work . I use the upright MB twinzers in mine at about 16.
Shame twins fell out of favour ,so fluid on the right wave ,and fizz through turns.
www.surfsailaustralia.com.au/product/mb-twinzer-fin-nuss-box#surf-sail-clothing-hardware
Think k4 leons would work well to.

AI.Dave

TAS

159 posts

AI.Dave

TAS, 159 posts

11 Mar 2026 7:56am

cheers Rango, i see what you mean - upright with some width. Mine might not be lifty enough, they have alot of sweep... will see

www.duotonesports.com/en/us/products/duotone-fin-quad-center-slot-2pcs-2024-14240-8042?variant=46234341409000

Manuel7

1349 posts

Manuel7

1349 posts

11 Mar 2026 7:31pm

Do you sail with short fins? Easy spot with lots of wind? Light weight?

4.7 could be a touch short. 4.2 no problem.

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