FIBERGLASS QUAD KEEL FIN SINGLE TAB

Name: FIBERGLASS QUAD KEEL FIN SINGLE TAB
Brand: nanazero
SKU: FF-QDKL-NV
Price: 113.0 USD
Availability: InStock

Color

Navy Milky White

$113.00

1% of sales will be donated to environmental conservation efforts through "1% for the Planet" or its member organizations.

Designed for mid-length fish surfboards, these quad keel fins are compatible with Futures fin boxes. Beyond their unique quad performance, these fins offer a balanced speed and turn performance, characteristic of keel fins.

Widening the base of the fins enhances elongation (drive ability) during turns, while the strong sweep allows for larger turns compared to general quad fins. Compatible with fish boards, they enable a stretched turn experience.

In addition to nanazero surfboards, they also fit surfboards with Futures fin boxes.

*Please ensure to check the specifications before placing your order.

*This set includes 4 pieces for the front, back, left, and right. Install them with the logo side facing outward.

Specifications

	Front	Rear
Depth	4.7 in	3.1 in
Base	5.4 in	3.9 in
Area	19.1 sq in	10.9 sq in
Foil	Flat	Flat
Cant	6.5°	3°
Base depth	3/4 in	1/2 in

Materials：Fiberglass, Polyester resin

Term related to Fin

We will explain the terminology and principles behind the elements that define the characteristics of fins:

fin

Base

The length of the horizontal part where the fin meets the surfboard.

A longer base enhances drive power and facilitates speed gain. Conversely, a shorter base improves turning performance and makes turning easier.

Depth

The length (height) of the vertical part of the fins protruding from the surfboard into the water.

Greater depth increases stability but also increases turn resistance. Conversely, smaller depth results in smoother turns but sacrifices stability.

Area

The area where the fin extends outside the fin box.

A larger area enhances stability and drive power but increases resistance. Conversely, a smaller area facilitates easier turns.

For longer boards and heavier riders (and boards), a larger area is required.

Sweep

The angle of inclination of the fin.

A greater sweep angle increases stability and drive power but also increases turn resistance. Conversely, a smaller sweep angle improves turning performance, results in smoother turns, and reduces turning radius.

Foil

Bulges on both sides of the fins.

Foil controls water flow. The "50/50" configuration, with bulges on both sides, is commonly used for center fins. The "Flat" configuration, flat on the inner surface and bulging on the outer surface, is commonly used for side fins.

fin

Cant

The angle at which the fin is tilted from a vertical angle of 90 degrees to the bottom surface of the surfboard.

Center fins are usually at 0 degrees (perpendicular to the board), while side fins are angled a few degrees. This angle increases water resistance when the board is tilted, enabling sharp turns.

【Reference】https://pocketsurf.jp/surfboard_fin

Notes

Some foreign substances, such as black dots, may be present due to the nature of the manufacturing process. Thank you for your understanding.

Scrape marks resembling grazes may be visible on the base due to the manufacturing process, but they are not considered defects.
While nanazero's fins are inspected to conform to the fin manufacturer's standard size before shipping, in rare cases, they may be difficult to fit due to compatibility issues with the fin box, or the fins may wiggle if the box is too large.
If the fins do not fit, do not force them, as they may become stuck. Instead, adjust by gently scraping the bottom of the fin with sandpaper.
If the fin wiggles and does not sit securely due to the fin box being too large, adjust the base thickness by applying aluminum tape for stability.
Fins made of hard materials can cause injury upon contact. Please exercise caution to avoid contact with people during wipeouts. If the fin tip is sharp, rounding it with sandpaper can help prevent injuries.

Guide to Choosing Fins

A guide to choosing for beginners and those who are not sure how to choose the right fins for their surfboard.

nanazero's 3 Promises

Pursuit of Quality

Although we are a young brand, we have partnerships with leading factories that have a long track record in the surfing industry.

We combine their technology with Japan's high quality standards to develop high-quality products.

Cost-Effective

Through online-centered direct sales from manufacturers, we reduce intermediate margins in the distribution process and store operating costs, and return them to our customers.

Good products, at a fair price.

Best Buddy

If you have any questions or concerns, please feel free to contact us at any time.

Even if you are a surfing beginner, we provide an environment where you can easily and confidently purchase online.

Giving back 1% of Sales to the Planet

nanazero donates 1% of its sales to environmental protection organizations through "1% for the Planet " with the aim of contributing to the conservation of the ocean and nature.

Sustainability and protecting the planet are always on our minds, and joining "1% for the Planet" is a commitment to protecting the environment for nanazero users and us.