Duotone Race D/LAB windsurf fin 36cm in carbon black, Tuttle box, carbon prepreg
Duotone Race D/LAB windsurf fin 36cm in carbon black, Tuttle box, carbon prepreg
NEW

Fin Race D/LAB (Tuttle)

FREERACE/SLALOM CARBON FIN

Variant:

C91:black/carbon

Find a Dealer
Item-no. 14260-7251
header_image_fin_tech

Presenting the most sophisticated fins out there! This is the easiest way to boost the performance of your board.

DUOTONE-Windsurf_SS26_Fins-Technology

LET'S TALK ABOUT FINS

THE MATCHING FIN DESIGN HAS A SIMILAR IMPORTANCE TO THE BOARD PERFORMANCE AS THE RIGHT MAST FOR THE SAIL.
THAT'S WHY WE HAVE SPENT A TREMENDOUS TIME AND EFFORT INTO SETTING UP A TRULY UNIQUE FIN RANGE.


THE 2 MOST INFLUENTIAL FIN DESIGNERS
With Dani Aeberli and Kai Hopf, the two Windsurfing fin designers with the most experience are responsible for our new fin range. Together, they represent over 50 years of expertise in fin design.


EXCLUSIVE SOFTWARE
We use our own dedicated fin 3d software. This software enables a perfect profile transition in the crucial tip area, where the fin sweeps backward. This is one of the secrets behind the outstanding efficiency of our fins.


EXCLUSIVE PRODUCTION
Setting up our own exclusive production was inevitable to take our fin performance to the next level. Every process is supervised on site by our own QC specialist Vasin Siritho to guarantee the highest level in quality and consistency.


FIN SPECIFIC TECHNOLOGIES
Instead of using the same technology for all our fins we are the only fin brand using 3 different technologies according to the fin length and range of use.

WHY OFFERING 3 DIFFERENT TECHNOLOGIES?

Here are the differences:

Injection molded fins are manufactured using a metal outside mold. Our exclusive CARBO_TECH material —a proprietary blend of thermoplastic polymer and carbon fibers— is injected into the mold under extremely high pressure and heat.

Advantages:
- Since this material is softer than G10 it's the ideal choice for shorter maneuver side fins to ensure the necessary tip flex despite the short length.

Disadvantages:
- For fins longer than 12cm, injection molded fins are too soft to ensure a proper performance.

Best suited for:
Injection molded fins are the ideal choice for short side fins.

HERE IS HOW A CARBO_TECH FIN IS MANUFACTURED

3D File to generate the injection mold

Carbo-Tech_productiion_01

Injection steel mold with injection pressure hoses

Carbo-Tech_productiion_02

Finished fins right out of the mold

carbo-tech_productiion_03a

G10 is an extremely compressed block of prepreg laminated fiberglass sheets. This block is placed in a CNC milling machine to create the final shape and profile.

Advantages:
- Due to its high-compression G10 is extremely durable.
- Easy to sand, allowing to repair damages caused by ground contact.

Disadvantages:
- The high-compression results in a higher weight, which is noticeable with longer fins.
- Not stiff enough for longer high-performance freeride/race fins.

Best suited for:
G10 is the ideal choice for medium-size maneuver center fins.

HERE IS HOW A G10 FIN IS MANUFACTURED

Highly compressed G10 blocks

G10_productiion_01

CNC milling the outline and profile

G10_productiion_02

Cleaning milling residues

G10_productiion_03

Finished fins with unfinished optic

G10_productiion_04

This is the most sophisticated method of manufacturing a fin. It is based on individual pre-impregnated (prepreg) fiber layers out of carbon and glass. These layers consist of single fibers that are laid side by side onto a carrier film and then pre-impregnated with resin by a specialized supplier in an industrial hydraulic press. This ensures the ideal ratio between fibers and resin (not too much, to avoid excessive weight and ensure a perfect bond between the layers, and not too little, to avoid dry spots that can lead to breakage) even before it is further processed by our factory.
For these reasons, prepreg fins are at least 50% stronger in terms of breaking strength than the standard/conventional RTM technology, which uses dry fibers with "uncontrolled" resin addition.

Advantages:
- Flex and twist are not only determined by the length, width, and profile thickness of the fin design (as with G10 fins), but can also be adjusted by the arrangement of the prepreg layers.
- Lighter than G10.

Disadvantages:
- Not as easy to repair damages caused by ground contact.
- The most expensive way to manufacture a fin.

Best suited for:
Prepreg fins are ideal for longer high-performance fins from freeride up to racing.

HERE IS HOW A PREPREG FIN IS MANUFACTURED

3D file to generate the mold

Prepreg_productiion_01

Milling the fin shape into a metal block to create the mold

Prepreg_productiion_02

Finished mold halves

Prepreg_productiion_03

Storage of pre-impregnated fiber layers in a refrigerator to prevent the resin from hardening

Prepreg_productiion_04

Templates for cutting the prepreg fiber layers

Prepreg_productiion_05

Cutting the prepreg fiber layers

Prepreg_productiion_06

Putting the single fiber layers into each mold halve

Prepreg_productiion_07

Mold halve (with non-stick coating) filled with carbon and glass fiber layers

Prepreg_productiion_08

Vacuum molding of the fin

Prepreg_productiion_09

Finished fin

Prepreg_productiion_10

PRODUCT DETAILS

Just like every product bearing the D/LAB label, the RACE D/LAB fin represents the pinnacle of technology and performance. The high-end design is PWA approved yet it's not ultra technical to sail making it the ideal aftermarket upgrade for any Freerace up to World Cup Slalom board.

Designed as Duotone's signature slalom fin for ultimate performance in the most demanding conditions, the RACE D/LAB delivers the lift required to keep your board perfectly balanced even in maxed-out conditions — giving you the speed and control to lead the fleet at that crucial first mark. A balanced design was central to its development, making it equally capable when heading downwind, upwind, or through sharp turns.


The construction is based on our Molded Prepreg Technology — the most advanced and most expensive fin construction available. Individually oriented carbon layers guarantee the stiffest possible base combined with a perfectly tuned tip-flex. The RACE D/LAB features the highest carbon content and quality of all our fins resulting in the highest reflex speed for maximum performance. This is premium engineering you can feel the moment you're on the water.

That construction standard enabled designer Dani Aeberli to use the thinnest profile of our entire fin range, minimising drag for maximum performance and top-end v-max. A super-stiff base combined with a sophisticated flex pattern — carefully limited to the very tip of the fin — delivers exceptional control while keeping the fin from ever feeling nervous or overly technical to sail. The result is a fin that's genuinely accessible, even on Freerace boards.

Going beyond your imagination - the RACE D/LAB sets a new performance benchmark to satisfy both competitive racers and speed-hungry amateurs.

FIN
LENGTH (CM)
BOX SYSTEM*
TECHNOLOGY
DESIGNER
REC. BOARD TYPES
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 32
32.0
TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 34
34.0
TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 36
36.0
TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 38
38.0
TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 40
40.0
TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 42
42.0
TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 44
44.0
MEDIUM TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**
Best Size
RACE D/LAB (TUTTLE) 46
46.0
MEDIUM TUTTLEBOX
PREGREP CARBON
DANI AEBERLI
ANY FREERACE/SLALOM BOARD
REC. BOARD SIZE (L)**
REC. DUOTONE BOARD(S)**

* Tuttle base specs: 50x31mm | Medium Tuttle base specs: 67x50mm

** Please see below under FIN SIZE RECOMMENDATIONS BY JORDY VONK

DUOTONE-Windsurf_2026_Fin_Race_D-LAB_size_recommendations

TECH AND SHAPE FEATURES

TechFeature

AI_Fin_3D

Our software is based on math data-driven input. Apart from being much more accurate and faster, complex 3D design tasks such as the perfect profile transition in the crucial tip area, where the fin sweeps backward, would otherwise have been impossible to realize.

This allows us to cross-check the outcome using artificial intelligence to ensure maximum precision. This is the key secret behind the outstanding efficiency of our fins.

BASE DESIGN

Super stiff fin base for most direct power transmission.

TWIST DESIGN

Blocked twist for increased lift, instant acceleration and max. performance.

Prepreg

This is the most sophisticated method of manufacturing a fin. It is based on individual pre-impregnated (prepreg) fiber layers out of carbon and glass. These layers consist of single fibers that are laid side by side onto a carrier film and then pre-impregnated with resin by a specialized supplier in an industrial hydraulic press. This ensures the ideal ratio between fibers and resin (not too much, to avoid excessive weight and ensure a perfect bond between the layers, and not too little, to avoid dry spots that can lead to breakage) even before it is further processed by our factory.

For these reasons, prepreg fins are at least 50% stronger in terms of breaking strength than the standard/conventional RTM technology, which uses dry fibers with "uncontrolled" resin addition.

Advantages:

> Flex and twist are not only determined by the length, width, and profile thickness of the fin design (as with G10 fins), but can also be adjusted by the arrangement of the prepreg layers.

> Lighter than G10.

Best suited for:

Prepreg fins are ideal for longer high-performance fins from freeride up to racing.

FLEX DESIGN

Flex reduced to the very tip of the fin for instant acceleration due to reduced drag combined with maximum control to reach v-max once the gust hits in.

OUTLINE DESIGN

Very straight leading- and trailing edge for maximum speed, control, and performance.

PROFILE DESIGN

Very thin high-performance profile, with the max profile depth at around 34-36% (depending on the length) to reduce drag as much as possible for maximum performance efficiency, control and v-max over a wide wind range.

AI_Fin_3D

Our software is based on math data-driven input. Apart from being much more accurate and faster, complex 3D design tasks such as the perfect profile transition in the crucial tip area, where the fin sweeps backward, would otherwise have been impossible to realize.

This allows us to cross-check the outcome using artificial intelligence to ensure maximum precision. This is the key secret behind the outstanding efficiency of our fins.

BASE DESIGN

Super stiff fin base for most direct power transmission.

TWIST DESIGN

Blocked twist for increased lift, instant acceleration and max. performance.

Prepreg

This is the most sophisticated method of manufacturing a fin. It is based on individual pre-impregnated (prepreg) fiber layers out of carbon and glass. These layers consist of single fibers that are laid side by side onto a carrier film and then pre-impregnated with resin by a specialized supplier in an industrial hydraulic press. This ensures the ideal ratio between fibers and resin (not too much, to avoid excessive weight and ensure a perfect bond between the layers, and not too little, to avoid dry spots that can lead to breakage) even before it is further processed by our factory.

For these reasons, prepreg fins are at least 50% stronger in terms of breaking strength than the standard/conventional RTM technology, which uses dry fibers with "uncontrolled" resin addition.

Advantages:

> Flex and twist are not only determined by the length, width, and profile thickness of the fin design (as with G10 fins), but can also be adjusted by the arrangement of the prepreg layers.

> Lighter than G10.

Best suited for:

Prepreg fins are ideal for longer high-performance fins from freeride up to racing.

FLEX DESIGN

Flex reduced to the very tip of the fin for instant acceleration due to reduced drag combined with maximum control to reach v-max once the gust hits in.

OUTLINE DESIGN

Very straight leading- and trailing edge for maximum speed, control, and performance.

PROFILE DESIGN

Very thin high-performance profile, with the max profile depth at around 34-36% (depending on the length) to reduce drag as much as possible for maximum performance efficiency, control and v-max over a wide wind range.

TechFeature

+6 WARRANTY

REGISTER YOUR NEW DUOTONE FIN FOR FREE ON OUR WEBSITE WITHIN 60 DAYS OF PURCHASE AND RECEIVE AN UNRIVALED EXTENDED WARRANTY OF 6 MONTHS BEYOND THE LEGAL WARRANTY PERIOD OF YOUR COUNTRY (EXCLUDING DAMAGES THROUGH GROUND CONTACT).

PLEASE REGISTER HERE

Quote Daniel Aeberli - Product Manager Boards & Fin Designer

»THE RACE D/LAB REPRESENTS THE PINNACLE OF BOTH TECHNOLOGY AND PERFORMANCE. WE ARE USING OUR MOST EXCLUSIVE PREPREG MOLDING PROCESS — THE SAME HIGH‑TECH CONSTRUCTION TYPICALLY RESERVED FOR ELITE WORLD CUP RACING FINS. THE DESIGN IS PWA APPROVED BUT LESS TECHNICAL TO SAIL. DO YOU WANT TO SIGNIFICANTLY IMPROVE THE PERFORMANCE OF YOUR FREERACE OR SLALOM BOARD? THEN THE RACE D/LAB FIN IS THE ONLY CHOICE FOR YOU!«

— Daniel Aeberli - Product Manager Boards & Fin Designer

Any comments or questions? Here you’ll find first hand R&D / rider Information.

The more info you provide, the more specific the advice/help will be. Please let us know:

  • Your skill level

  • Your body weight and size

  • Mast(s) you plan on using with the sail

  • Board(s) you are using

  • Conditions/spots you are sailing at

Please note: To help as many people as possible follow the thread, the forum language is English only.