Quote Originally Posted by trayson View Post
Fins for a kid's board? And a tri fin setup for a board that only uses 2 of the 3?
Size - Think of it as a matter of scale. Wake vs ocean. The waves are significantly smaller, the boards are significantly smaller and the fins are significantly smaller. That DW board you ride behind your boat would be a grom sized (kids) board in the ocean.

Fin companies sell fins as thruster sets (3 fins) or quads (4 fins) typically. Not to say you can't buy just one or just the quad rears etc. 99% of performance surfing in the ocean is done with thruster or quad set ups. The majority leaning toward thruster.

That third fin isn't really needed in wake surfing because you don't find you need the extra hold. You aren't blasting down the line or ripping huge lay backs off the lip.

Not to say that you couldn't have Brock make you a board with a center fin box to take advantage of the center fin when you want to have that hold. Your call.