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Quirk Single Fin - US Box

Name: GONG - Quirk Single Fin - US Box
Brand: GONG
SKU: GON25FINSINUSBQUIWHB-75
Price: 49.0 EUR
Availability: InStock

The QUIRK single fin for US boxes.

See Description

49€

Type fiberglass

fiberglass

Taille 7"5

7"5
8"0
8"5
9"0
10"0

Couleur WHITE AND BLACK

Screw + Nut US Diametre 4mm

Unique

Microfiber Poncho First

BLACK

Available on June 15, 2026

Surf Hat Sunguard UPF50+

Unique / Noir

            0
            -4

  qc 0
  ps -4
  iq 0
  mq 4

The product will be available from June 15, 2026

ref : GON25FINSINUSBQUIWHB-75

Direct sale from shaper to surfer

Quality boards conceived in France

Pay in multiple installments

fins-single Single
fiber-glass-fin Fiber Glass
box-us-simple US Box

Details

Board type

Shortboard

Midlength

Longboard

Template

Upright

Neutral

Raked

Aptitudes

Drive

Pivot

Hold

Speed

Program

Description

Program

A more powerful and secure dolphin fin, designed to provide control, drive, and stability in more committed conditions.

Overview

The Quirk builds on the classic dolphin fin template by adding more surface area and control. Where a fin like the Poster prioritizes flow and freedom, the Quirk strengthens grip and stability, especially as speed increases. It still retains genuine glide, making it a well-balanced fin between performance and comfort.

Its increased surface area, particularly emphasized at the base, helps secure the rail and easily keep the board in the wave face. It provides a solid feeling under the back foot, ideal for driving through committed turns without losing control. Its moderate rake preserves smooth lines while making transitions easier.

Template

Powerful and stable dolphin template. The rake is moderate, maintaining a good balance between projection and manoeuvrability. It promotes smooth arcs while preserving line stability.

Base

The base is wide, generating drive and reinforcing control in powerful turns. It keeps the board locked on rail through fast sections.

Depth

The depth is significant, increasing grip and stability, especially in hollow or fast waves.

Surface area

The surface is substantial, larger than a classic dolphin fin. It is mainly concentrated at the base, reinforcing hold and security without making the board feel heavy.

Setup

The single setup is a configuration based on a single center fin. It prioritizes stability, line reading and smooth trajectories. The fin acts as the main anchor point, guiding the board with precision and continuity.

The feeling is stable and linear: the board holds its line, glides easily and favors long, drawn-out curves rather than quick directional changes. Surfing is built over time, with progressive engagement in each turn.

This is an ideal setup for smooth and controlled surfing, focused on trim, long lines and a natural connection with the wave.

Technologie

Nos dérives sont fabriquées à partir de plaques de fibre de verre pleine masse, ce qui garantit une excellente solidité et une grande fiabilité. L’usinage dans la masse permet d’obtenir des formes très précises, fidèles au design initial, pour un comportement sain et constant dans toutes les conditions. Cela permet aussi de développer facilement différents templates et d’ajuster les performances selon les besoins.

La même construction est utilisée sur toute la gamme, assurant une cohérence de flex et de sensations entre les modèles. Ce procédé, largement éprouvé, offre une très bonne résistance aux appuis puissants et une excellente durabilité.

Résistantes à la torsion, aux impacts, ainsi qu’à l’eau salée et aux UV, ces dérives conservent leurs performances dans le temps tout en restant simples à entretenir et réparer si besoin.

Technical sheet

Quirk Single Fin - US Box fiberglass / 7"5 / WHITE AND BLACK

Buying guide

Who is it for?

The Quirk is designed for surfers who venture into more committed conditions. It suits intermediate to advanced levels and is ideal for those who want more control at high speed. It allows you to surf with complete confidence.

It is aimed at surfers looking for a versatile yet reassuring fin, capable of performing in more powerful conditions.

What is it for?

The Quirk works equally well on modern longboards, single boards, and mid-lengths.

In a 2+1 setup, it becomes a true anchor point that allows you to push harder through turns. Ideal for fast waves, as it enables confident surfing at high speed.

What size?

For large retro logs and noseriders, sizes 9” to 11.5” are the most appropriate. The more you prioritize nose riding, hold, and stability, the larger you should go.

As always:

larger = more stability, more hold, more control
smaller = more glide, more freedom, more maneuverability

The right choice depends on the board, the surfer’s weight, wave speed, and surfing style.

Minimum size favors: glide, speed, maneuverability

Maximum size favors: stability, control, noseriding

Example for a 9'2 longboard

9” → more speed and maneuverability
9.5” → more stability
10” → more noseriding

Light surfer → slightly smaller size.

Heavy surfer → slightly larger size.

A simple rule is to choose a fin roughly one inch longer than the board length. This works especially well for classic longboards and noseriders. For more modern or shorter boards, you can slightly reduce size to improve maneuverability and speed.

How to choose between two close sizes?

Within the same fin range, the difference between two sizes (for example 10” and 10.5”) may seem small, but it noticeably affects board behavior.

Example: choosing between 10” and 10.5” on a 9’ longboard

With 10”:

the board feels more lively
turns are easier to initiate
slightly faster glide

With 10.5”:

the board is more stable
the tail stays more anchored in the water
easier noseriding

The 10” suits a more versatile longboard or a surfer who likes to turn. The 10.5” is better suited for a noseriding-focused log.

You can also adjust based on surfer weight, on a 9’6 longboard with the same fin:

a 65 kg surfer may prefer a 10” for more maneuverability
a 85 kg surfer may prefer a 10.5” for more control and hold

Weight directly affects pressure on the fin, and therefore the surface needed for stability.

Adjust based on waves

In slow, soft waves, a slightly larger fin helps slow the board down and stay in the pocket.

In fast or hollow waves, a slightly smaller fin makes transitions easier and increases freedom in turns.

Adjust based on surfing style

noseriding and classic trim → choose the larger size
more turns and freedom → choose the smaller size

When in doubt between two sizes, ask yourself: “Do I want more stability or more maneuverability?”

Larger → stability, noseriding, drawn lines

Smaller → glide, speed, freedom.

Equipments

Center fin compatible with a US Box system.

Supplied with a fin plate and screw for mounting in a US Box fin system.

Delivery

Orders are prepared and shipped quickly: most are dispatched within 24 to 48 business hours.
The delivery time, meaning the transit of the parcel to your address, then depends on the delivery location and the carrier.
Shipping costs are transparent and calculated based on weight, volume, and delivery address.

View all our delivery FAQs.

Exchanges & Returns

You have a 14-day right of withdrawal to return or exchange a new product that does not suit you.

View our returns FAQs.

Eco-Responsible Packaging

We prioritize sustainable, recyclable, and reusable packaging solutions, minimizing single-use plastic as much as possible while ensuring optimal protection for products, including large items.