Webber Extractors SetFin flex has been misinterpreted for decades, and it is my thinking that there is nothing amazing happening when the fin returns to being straight after it has flexed and bent during the turn. Its whats happening during the turn that counts, not at the end of the turn. The reason why this misinterpretation has happened at all is because the net result of the turn (with a well designed flexing fin) is a burst of speed out of the turn, and so no wonder

and so when you increase the depth of the fin by let’s see 20% then you are adding that 20% in the best part of the wave face deeper inside it

As a result the fin can both pivot and flex a little to match with the line that the front fins are taking

$150 AUD SET

The hold increases because the chance of cavitation is radically reduced

The speed through the turn is enhanced significantly when a larger fin with more rake and depth can bend to the arc of the turn

POST OVERSEAS $25

Then imagine how nicely the water will flow around both sides of the fin

Webber Extractors Set

The actual foil shape itself isn’t even that relevant when a fin can flex to the right degree

$35 TAIL KEEL

The transformers Tri-fin set has the same size front fins as the quad set but has a flexing keel in the rear plug

Too little flex and you are trying to do a curved turn with a straight object