Future Fins - Large Carbon Fiber Black Keel SUP Fin Stand Up Paddleboard

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Price: $97.99    

Product Feature

• LG Keel Area: 44.4in

Product Description

The Future Fins SUP Keel Fin is a low-profile fin for efficient flat-water racing and touring. Great for shallow waters and made of Carbon Fiber

Future Fins - Large Carbon Fiber Black Keel SUP Fin Stand Up Paddleboard Review

I haven't gotten it yet, should be here tomorrow, but this looks like what I would make if I could somehow make whatever kind of fin that I wanted to.
This is a rather significant product and I was disappointed with the lack of reviews or pictures of it, or even the dimensions, on the internet. I will be updating this review tomorrow and adding customer photos.
I'm really excited about this keel and have high hopes for it making my water-sport experience better.

Update: got the fin, and it seems well made and the design seems to be good for creating the least amount of drag and still be functional for the real world environment, and its intended use, on something you want to generally go in a straight line but still be able to turn when needed.
One of the things I was concerned with was exactly how deep into the water this fin would extend. My best estimate using a long ruler and a tape measure, is about six and three eighths inches, off from the fin box.
I did order a fin box to go with it but haven't gotten it yet. And I should note here that when I ordered the fin box, I was debating whether to get the seven and a half inch one, or the ten and a half inch one. I made the right decision to go with the longer one because the part that goes in the box, on this fin, is about seven and three-quarters inches long.
Got the fin box and put more photos up here. There is another, nice photo of the fin in the box, on the box's product page for: 10.5" Standard Longboard Surfboard Fin Box (Bayne Style).
It seems that the method for holding a fin in the fin box is that the screw pushes the fin down into the bx so that it bottoms out, then the friction between the fin bottom and the box bottom keeps it from just sliding up and down the box. There is only a small amount that the screw can move the fin because of the close quarters inside the box, with the slider piece that the screw threads into fitted in to a slot machined into the face of the main slot that the fin slips into. So there are close tolerances involved where if the fin is not finished to the exact size, then it does not press against the bottom of the box hard enough once the screw is bottomed out, with the fin right up tight against the threaded slider piece in the small side slot. If it still can slide up and down the box with the screw all the way tight, then you can place strips of masking tape on the bottom of the fin to take up the slack. Put one piece on at a time, then put the screw in and check if it is tight yet, if not, add another strip. Keep doing that until you can't slide the fin down the slot when the screw is tight. As you do that, take a sharp razor knife and slide it along the fin bottom corner edge to cut the excess tape sticking out past the fin. The carbon fiber is pretty hard so the knife does not dig in, so the procedure is simple and does away with the false sense of being finished when you are really not, because of stuff on the side holding it, which wont really hold up in use. You have to have just the bottom holding in order to last very long.
The other thing I discovered is that the material the box is made of is slippery, so the bottom of the fin, or the tape placed on it, slides even if it is tight, if you pull on it hard. What stopped that for me was cutting a strip of masking tape to fit, and sticking it to the bottom of the box to add traction, so now it doesn't slip even if I pull pretty had on it.

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