Duotone Duke 2025 Black/Turquoise

Duotone Duke is a 5-batten sail wave/freemove without cambers. It is extremely versatile, making it suitable for all skill levels of riders. The centre of effort shifted forward will provide you with plenty of power. Larger sizes are perfect for freeriding. The Light Done Right construction, combined with Duotone's new solutions, sets a new benchmark for sails designed for bump & jump.
    Duotone's most successful 5-batten sail ever is back!  Bringing back the legendary DUKE was a daunting task that took over 1,5 years of intense development. At DUOTONE, you, the final user is always at the center of development. Therefore, especially with the new DUKE it wouldn’t have made sense to “just” rely on team rider input and feedback. As a starting point Duotone involved “real” end-consumers who use these kinds of sails regularly and surf centers to define a bucket list for the new DUKE. And here is the outcome and how designers went about it:

Maximum wind range, especially in variable conditions and/or very gusty winds

This is the most important factor and the major advantage when going for a 5-batten handling sail. As a simple rule, more battens give you more control and a bigger wind range. Usually this has a negative effect on the low end power as more battens make it harder for the wind to inflate the sail, and it becomes less efficient for pumping. Therefore, Duotone have incorporated the BATTEN FREE CENTER concept from the SUPER_HERO. Instead of the usual even batten distribution, the DUKE features a bigger gap between the foot batten and the batten above the boom. This makes the boom area easier to inflate plus increases the stability in the top (due to the increased batten density in this area). The second downside is that every batten increases the weight of the sail. That’s the reason why there was a trend towards fewer battens for wave sails in the past years.

   

Product highlights

Draft Forward
Forward draft turns power off and goes completely neutral during manoeuvres >> results in a much higher success rate

Batten Free Center
Larger gap between the foot batten and the batten above the boom >> better inflation (= planing power) in the boom area and improved stability in the upper sail area

LIGHT DONE RIGHT Construction
Weight reduction of a clearly noticeable 200 to 300 g without reducing the thickness of the main panel thus maintaining the well-known durability and longevity!

Super neutral in maneuvers
To make tricks and turns as easy as possible the sail should go completely neutral during maneuvers. Therefore, the DUKE comes with a more forward oriented draft position. The forward draft turns the power off and goes completely neutral as soon as you sheet out or shift the sail. This results in a much higher success rate in maneuvers

Early planing power even without excessive pumping
To achieve maximum planing power, the DUKE features a high draft distribution combined with a deep profile which helps lifting the board onto the plane

Good lift with maximum control for jumping
The higher draft position also increases your airtime as it generates lift, while the more forward oriented draft position helps you to always remain in control

 

Features

3D Top Cap

Optimised pull. On regular top caps and pin systems, the webbing is connected in a “one-dimensional” way with the sail body (either side to side or front to back), which transfers the downhaul tension only in certain points. The 3D TOP CAP allows a “three-dimensional” and very widespread transition of the downhaul forces into the sail body. This eliminates top fluttering and ensures a progressive loose leech, extending the wind range. The integrated abrasion ribs eliminate the need for heavy, bulky reinforcements at the end of the luff sleeve

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Set & Go Vario Top

No more trial and error when trying to find the best vario top setting. Even when first rigging up, the correct length of the vario top is found straight away. Clear length indicators mark out the perfect setting with reference to the mast length used, eliminating any need for testing or re-adjustments

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Polyester Webbing Only

Eliminating stretch and loss of tension. If it’s good enough for safety harnesses, it’s good enough for windsurfers! Duotone is the only manufacturer to use only polyester webbing for the (vario) top and the tack roller. This advantage of this compared to conventional polypropylene is the negligible amount of stretch. As a result, even brand-new sails will retain full luff tension and will not need subsequent trimming

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Double D Buckle

Inspired by high-strength climbing harnesses and Formula 1 helmets. The exclusive, two-part metal double-D buckle on the vario top, which replaces traditional solutions. This design guarantees the best trimming characteristics and eliminates all webbing slippage

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One Piece Sleeve

No more seam at the leading edge > 80 g lower weight > no hard spot through overlapping panels improves elasticity at the leading edge

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Double Seam Technology

Double the durability with half as much stretch. DUOTONE manufactures products of unmatched quality, which gives our sails a significantly longer lifetime. A key feature which helps to achieve this is the triple-stitch zig-zag seams. Unlike other products with their single-seam design, these are double-seam. They cover all exposed crash areas, which increases tear resistance and reduces bending-elongation by up to 50%, boosting profile stability and performance

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VTS - Visual Trim System

Perfect trim and a huge range of use. You won’t find a quicker or more accurate way of trimming your sail. Even beginners can trim the sail in a matter of seconds to 100% accuracy. All you need to do is pull the luff until the top of the loose leech reaches the “lower wind limit” or “upper wind limit”. The VTS acts as a power boost, ensuring maximum performance and broader range of use

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IRocket 2.0

Super-lightweight and aerodynamic. An inconspicuous detail with a massive impact. iROCKET 2.0 batten tensioners are super-lightweight, aerodynamic and highly stable, consisting of high-quality components such as a self-lubricating, salt-water-resistant brass nut with stainless-steel screw which can withstand all batten tensions. Furthermore, the iROCKET 2.0 is an essential component for a true windsurfing revolution. 100% correct batten tension, correctly adjusted when purchased and forever after

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Epoxy Batten

Extremely stable, extremely break-resistant. Depending on the range of use, positioning in the sail and the necessary tension, the batten stress is enormous. In order to prevent breakages, the Duotone only fit into all solid battens extremely durable epoxy laminates which really can withstand anything and can live up to DUOTONE’s promises in terms of longevity

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Mini Batten

These prevent unwanted leech flutter. Short and highly effective mini-battens which provide support for the areas between the battens and prevent undesirable flutter

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XPly Plus

The Duotone use only 150 or 100 micron thick films for their exclusive XPLY PLUS. In an extensive series of tests, they have developed the ideal combination of necessary film thickness and number of threads. The X.PLY PLUS in particular, at 150 microns in thickness, boasts durability characteristics far in excess of previous laminates at minimal weight

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Sleeve Opener

Frictionless insertion of the mast into the luff sleeve. An ingenious solution does away with the tedium of inserting the mast. The DUOTONE logo above the boom cutout gently opens the sleeve so that the mast can be threaded with one hand into the luff friction-free, without having to constantly make adjustments to the luff

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Triple Tack Roller 3.0

Find the perfect trim with minimal effort. The integrated, nickel-plated brass triple roller minimizes the downhaul forces tremendously

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Individual Boom Length Indication

The correct boom length without the need for trial and error. Because the boom is attached to the mast at different heights depending on body size, and because this creates a different angle to the mast, the boom length will vary. Specific recommendations for the correct length are printed directly on the luff sleeve at the boom level

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HTS 2.0 Harnessline Trim System

Never position your harness lines incorrectly again. Do away with the tedium of adjusting to the optimum rope position, as well as the numb forearms and the endless fiddling around. The patented print on the sail shows exactly where the center of the harness line has to be. All you need to do is position the two ends symmetrically at the left and right of the print

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VTS Tail Outhaul Specs

Each sail carries individually defined visual indications for the correct outhaul extension (requires VTS TAIL boom)

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Duratech Foot

Long-term guarantee for the sail foot. When starting off on the water or catching up, the foot of the sail is constantly dragged over the nonslip coating, particularly for wide boards. With the exclusive DURATECH FOOT, the seams are completely protected within a large plastic channel so that the surface cannot chafe against seams and material

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Twin Strap

This keeps the sail rolled up and holds the protector to the mast. A brilliantly simple fastening system which keeps the sail compact and closed after being rolled up and, when on the water, holds the mast protector closely to the mast

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Dura Luff Patch

Extremely stable luff reinforcement. The area around the boom cutout is exposed to extreme wear and tear, as the luff panel gets folded when inserting and pulling out the mast. This “accordion effect” can lead to tears in the monofilm after a while. The flexible DURA LUFF PATCH reinforces this area, making for a soft transition into the monofilm to avoid film brakage

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IBumper Incl. VTS Slot

A real innovation that offers additional value is the new iBUMPER 2.0, since in addition to its function as a lightweight and reliable mast protector, it is also useful as a trimming tool. After stretching on a new sail, the best indicator for optimum trim is the position of the mast end at the height of the protector. For this reason, the new iBumpur now has a vinyl viewing window so that the lower edge of the mast ca be identified

 

Area (m²)	Luff (cm)	Boom (cm)	Extension (cm)	Battens	Cams	Vario top	Rec. Mast	Weight (kg)
4.2	380	154	10/0	4	No cam	Yes	PLATINUM/GOLD>SILVER RDM 370/400	3
4.5	390	158	20/0	4	No cam	Yes	PLATINUM/GOLD>SILVER RDM 370/400	3,1
4.7	404	164	4	4	No cam	No	PLATINUM/GOLD>SILVER RDM 400	3,2
5.0	412	168	12	4	No cam	No	PLATINUM/GOLD>SILVER RDM 400	3,3
5.4	432	170	2	4	No cam	No	PLATINUM/GOLD>SILVER RDM 430	3,4
5.8	440	178	10	4	No cam	No	PLATINUM/GOLD>SILVER RDM 430	3,5
6.2	452	182	22	4	No cam	No	PLATINUM/GOLD>SILVER SDM/RDM 430	3,6
6.7	466	190	6	4	No cam	No	PLATINUM/GOLD>SILVER SDM/RDM 460	3,7