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Old 9th January 2010, 03:04 AM   #1
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Join Date: Sep 2009
Posts: 4
Default which fin?

Just bought I-sonic 122 .I weight 70 kgs and use 7.5 sail.I would like to know which fin is most suitable.The board came with a 40 and 46 fin.I wonder if 48 would be more suitable.
Can you give more advice regarding the prons and cons of the above fins?

Thanks a lot

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Old 9th January 2010, 03:54 AM   #2
Chris Pressler
Join Date: Sep 2006
Location: AUSTRIA, Lake Neusiedler
Posts: 333

Hi Carolos,
out of my view a 44 or perhaps a powerful 42 work at its best in this board. I tested a lot with a 48, but used it just with my biggest sailsize a 9,0 (8,8) and in sweet water conditions.
90 % of the time I used a 44.
Have fun,


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Old 9th January 2010, 05:36 AM   #3
Join Date: Aug 2008
Location: San Juan, Puerto Rico
Posts: 573

I have also been very successful with a 44 Canefire from Vector Fins and a 46cm D2 from F4 fins,
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Old 11th January 2010, 09:53 PM   #4
Join Date: Aug 2006
Location: Dallas, Texas USA
Posts: 799


A lot depends on how you are going to use the board. If you do a lot of slalom racing, then fins on the smaller side may be better (40). If you are free sailing, you may like a larger fin to work upwind (46).

If you are used to formula sailing with 70 cm fins, then you probably would like a larger fin since you can manage the necessary leverage needed with a big fin.

a 48 seems too large for your 70kg weight. I think Chirs and nonopr both make the correct recommendation - 44cm.

I have the iS 111, which came with 38 and 44 cm fins. I bought a tectonics tomcat 42 which I use for freesailing and it works great. I only use the 38 if speed sailing or downwind slalom. The 44 is no better than my 42 (which is more powerful).
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.
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Old 12th January 2010, 01:59 PM   #5
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Thanks a lot to all of you, that was great help!!!!!!
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