Fins are the number one difference between a waveski and a surf kayak.
Like a surfboard, the tri-fin thruster set up of fins is one of the best.
We recommend 3.5" - 4" set of fins. With two outer (rail) fins under your hips
and the center (trailer) fin behind, you can really carve up and down the waves.
For larger surf, you can use a larger center fin (5"-6.5") in the set
for more control and down the line speed.