Ronix Bottom Mounted Surf FinRonix Bottom Mounted Surf Fin Ronix Bottom Mounted Surf Fin Perfect for recreational wakesurf riders who want a reliable, adjustable fin that handles everyday conditions behind the boat. This single fin suits intermediate riders progressing beyond beginner boards, offering solid control and predictable response across varied water states. The transparent polycarbonate construction lets you see exactly what you're working with, and the bottom mount