Read this on Real watersports website:
"Your fins are 50% of the wetted surface when you’re up and planning. When you look at the entire board and look at how “small” the fins are, it’s easy to convince yourself that it couldn’t matter that much, right? But when your board is up and planning, the fins make up 50% of the wetted surface of the surfboard/fin combo."
"Your fins are 50% of the wetted surface when you’re up and planning. When you look at the entire board and look at how “small” the fins are, it’s easy to convince yourself that it couldn’t matter that much, right? But when your board is up and planning, the fins make up 50% of the wetted surface of the surfboard/fin combo."