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Old 7th March 2010, 08:45 AM   #2
Join Date: Apr 2009
Posts: 421

I've heard that the general rule for fins is 5x sail size in m2 + 3. So according to this for your 6.5 something around 36cm would be right. However, for a tail that is so wide I think this would be too small (especially with the straps in the outboard position).

According to these guys you're going to need something around 38cm.

Hope this helps.
JP Super-X 106l, North F8 Ram: 5.8m,
175cm, 54kg
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