DYNAFIBER FREERIDE FIN US 27

The Dynafiber Freeride Fin PB (Power Box) is a classic "all-arounder" designed to provide stability, easy planing, and forgiving control. It is a popular choice for recreational sailors who want a reliable, performance-oriented fin without the high cost of full carbon.

Here is the breakdown of the 2025/2026 Freeride PB model:

1. Vinylester Construction

Unlike basic plastic fins, this model is made from Vinylester.

• Stiffness: It is significantly more rigid than plastic, which helps the board get on a plane faster and hold a better line upwind.

• Durability: Vinylester is highly resistant to impact and abrasion. If you nick a rock or sandbar, it can be easily sanded back to shape, unlike G10 which can sometimes delaminate or carbon which is very brittle.

• Flex Pattern: It features a "progressive flex" at the tip. This acts like a shock absorber, preventing spin-outs by bleeding off excess pressure when you hit a gust or push too hard on your back leg.

2. The Freeride Shape

• Modern Profile: The fin has a generous surface area at the base for early planing and a swept-back (raked) leading edge.

• Maneuverability: The slight curve makes jibing much smoother and more intuitive than a vertical slalom fin.

• Power Box (PB) Head: This is the standard single-bolt system found on the majority of freeride boards (Fanatic/Duotone, JP, Tabou, etc.). It’s the easiest system to install—just one screw from the top.

3. Technical Specifications

4. Size Guide (General Rule)

To choose the right length for this fin, you can use the common freeride formula:

Fin Size (cm) ≈ (Board Width in cm × 0.6) — then adjust slightly for your sail size.

• Small (28–32cm): Best for high winds and boards around 90L–105L.

• Medium (34–38cm): The "sweet spot" for 110L–130L boards and 6.0m–7.5m sails.

• Large (40–44cm): For light wind, large boards (140L+), and sails up to 8.5m.

Why choose this fin?

It is the perfect replacement for the "stock" fin that comes with most boards. It offers a significant upgrade in speed and "lift" compared to plastic fins, but it is much more durable and affordable than a racing G10 or Carbon fin.