Introducing the 5.5" Keel Fin — the fast, stable upgrade for flat water paddling. Perfect for SUP touring and paddleboard racing, it slices through calm water with less drag and more confidence on every stroke.

Key Features & Design

• Fast, low-drag keel shape: 5.5" height with a rake fin design that reduces leading-edge drag for flat water performance.
• Enhanced stability: The long base line provides massive side-to-side stability, and will increase board stability by 30% when replacing a traditional dolphin nose fin.
• Rigid fin construction: Built for stiffness and durability in saltwater or lake adventures.
• Precise specs: Depth 5.5", Base 6", Rake 45 degrees.
• Broad compatibility: Works on any SUP or surfboard with a standard 8.5" or 10.5" fin box.
• Known incompatibilities: Some inflatable SUPs such as Bali Solstice and AquaMarine SPK2.
• No-tool installation: Includes the free "No Tool" fin screw and plate set so you can install this on your board right away without any tools.
• Upgrade your ride: Upgrade your setup today and enjoy a faster, more stable ride on flat water. The 5.5" Keel Fin is the practical choice for riders who value speed without sacrificing control.