The US Fin Box System

Our inflatable paddle boards now use the renowned universal fin system called US Fin Box. The advantages?

• If you break or lose your central fin anywhere in the world, you can easily find a replacement — the system is universal
• It allows us to include better performing fins that improve traction on the water
• You can easily swap different fin shapes according to your needs — touring fins, river fins, motor fins and more

Step 1 — Remove the Screw from Your Fin

Your central fin comes with a screw and a squared base. Unscrew the squared base and keep both pieces handy — you'll need them to lock the fin in place.

Step 2 — Slide the squared base into the Box

This square base is used to fix your fin to the fin box. Insert it inside the fin box, detached from the fin. 

Step 3 — Position your squared base

Slide the square base into the rail to position your fin. Using the screw will help secure it in place.

Step 4 — Insert your fin into the fin box

It’s now time to insert your fin into its base. Start by inserting the back of the fin, making sure the metal pins slide into the rail.

Step 5 — Align the front hole with the square base inside the fin box

Use both hands to align the screw hole at the front of the fin with the square base inside the fin box. The fin won’t slide in easily because it’s designed to fit snugly to prevent movement and vibration once installed.

Step 6 — Screw your fin into place

Use the screw to lock your fin in place. The screw will go into the square base and secure the fin.

Step 7 — The small fins use a screw-in system

Now it’s time to install your small fin, which uses a screw-in system. Insert the front of the fin into the slot on the fin box rail and slide it forward.

Step 8 — Screw the fin into place

Screw the back of the fin into the rail of the fin box using your hands.

Watch James install a US fin.