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Grew Keel Fins Set - ST Box

Name: GONG - Grew Keel Fins Set - ST Box
Brand: GONG
SKU: GON25FINTWIFUTGREWHB-S
Price: 45.83 EUR
Availability: InStock

The GREW keel fin set for Single Tab boxes.

See Description

45,83€

Type fiberglass

fiberglass

Taille S

S
M
L

Couleur WHITE AND BLACK

Fin Screw Key

Unique

Screw for Futures Fin Box

Poncho Travel Light

SAGE GREEN

            0
            -3

  qc 0
  ps -3
  iq 0
  mq 3

The product will be available from June 15, 2026

ref : GON25FINTWIFUTGREWHB-S

Direct sale from shaper to surfer

Quality boards conceived in France

Pay in multiple installments

fins-keel Keel
fiber-glass-fin Fiber Glass
single-tab-box Single Tab Box

Details

Board type

Shortboard

Midlength

Longboard

Template

Upright

Neutral

Raked

Aptitudes

Drive

Pivot

Hold

Speed

Program

Description

Program

A classic keel designed to maximize speed, drive and long flowing lines.

Presentation

The Grew embodies the very essence of traditional keel fins. It is directly inspired by the first fish boards from the 70s, designed to generate maximum speed down the line and deliver a pure and continuous glide. Where modern keels aim to add maneuverability, the Grew fully embraces its retro character: draw lines, accelerate naturally and connect sections with ease.

Its elongated template, combined with a particularly long base and large surface area, helps efficiently channel water flow toward the tail of the board. This setup creates constant, almost mechanical drive that gives the feeling of being “pulled” through the wave. The board gains speed without pumping and keeps its momentum even through softer sections.

A fin designed for authentic glide, a surf style rooted in tradition, and a unique natural speed sensation.

Template

Classic highly elongated keel template. The rake is pronounced, which promotes long drawn trajectories and projection. It helps maintain speed through turns and extend lines.

Base

The base is very long, a key element of the fin’s behavior. It generates strong and constant drive, creating continuous traction in the wave.

Depth

The depth is relatively moderate compared to the base, which limits drag and promotes glide. It maintains a good balance between speed and control.

Surface area

The surface is significant and distributed along the full length of the fin. It increases lift and grip, while stabilizing the tail in the absence of a center fin.

Setup

The twin keel setup is a configuration oriented toward natural speed, projection and stability. Thanks to their very long base and large surface area, keels generate continuous drive that allows the board to accelerate effortlessly and maintain speed along the line.

The feeling is smooth and grounded: the board holds its line, glides naturally and favors long drawn out turns rather than quick direction changes. Surfing is built through continuity, with a consistent line that supports every turn.

This setup is ideal for drawing lines, maintaining speed and using the full length of the wave, with a style focused on flow, glide and wide open turns.

Technology

Our fins are manufactured from solid fiberglass panels, ensuring outstanding strength and long-term reliability. Precision CNC machining from solid material allows for highly accurate shapes that stay true to the original design, delivering smooth, consistent performance in all conditions. This process also makes it easy to develop different templates and fine-tune performance characteristics to suit specific needs.

The same construction method is used across the entire range, guaranteeing consistent flex patterns and feel between models. This proven manufacturing process provides excellent resistance to heavy loads and exceptional durability.

Highly resistant to torsion, impacts, salt water, and UV exposure, these fins maintain their performance over time while remaining easy to maintain and repair when needed.

Technical sheet

Grew Keel Fins Set - ST Box fiberglass / S / WHITE AND BLACK

Buying guide

For whom?

The Grew is aimed at surfers who enjoy retro surfing and pure glide. It suits an intermediate to advanced level. It is ideal for those who prioritise long lines and flow over radical manoeuvres. It performs perfectly in long, clean waves. It requires wave reading and anticipation. This is a fin for stylish, traditional surfing.

What for?

It fully expresses itself on retro fish, wide boards and low-rocker shapes, in long waves where flow takes priority over radical surfing.

The Grew favours wide, drawn-out turns rather than tight manoeuvres. It relies more on anticipation and wave reading than on quick directional changes.

The Grew is made for retro fish and traditional twins. It maximises down-the-line speed. A reference for pure retro surfing.

What size?

The choice of keel size depends on several factors that work together:

the surfer’s weight
the tail width
the overall volume of the board
the type of waves surfed

A heavier or more powerful surfer will benefit from a larger surface area to maintain control and projection. Conversely, a lighter surfer can slightly reduce the surface area to gain manoeuvrability and freedom under the back foot.

The tail width is also a key factor. Fish boards often have wide tails that generate a lot of lift and natural speed. To stabilise this tail and fully harness that speed, larger keels generally work better. On a narrower fish or hybrid board, a slightly smaller keel will help maintain manoeuvrability.

The overall volume of the board also influences the choice. A voluminous or wide board will require more surface area to remain stable at speed. A more compact or lower-volume board can work with slightly smaller fins.

Finally, surf conditions also guide sizing. In small or weak waves, a larger surface area helps maintain speed and projection. In faster or more hollow waves, a slightly smaller keel can improve manoeuvrability and control through transitions.

In practice, it is about finding the balance between drive, stability and manoeuvrability, depending on the board and the desired surfing style. A large keel favours long lines and natural speed, while a slightly more compact keel delivers a looser and more responsive board.

Equipments

The set consists of two side fins (right and left).

It comes with a fin key for installation.

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.