What Size Flex Fin?

Hi all,

I have a 7’6" Bing collector, and I want to experiment with a flex fin. I’m 5’9", 155lbs, tail width on my board is 14.5" (pintail). My main mode of transportation is a 9’8" log/10" D fin and I absolutely love it. 

I have my eye on a 9" Greenough 4a flex fin. Is that too long? Help…

A nine incher may be a bit much depending on where you surf (type of wave) for the 7’6’'. Not all flex fins are created equal. There are varying degrees of flex and where along the fin cord the flex occurs, ie. only at the tip vs. further down. If you want to experiment with flex, try foiling a few yourself. It is not difficult and you use the plys to maintain symmetry and taper. Keep an eye on the plys like the rings of a tree to be sure they are the same on both sides. Good Luck.