Duke

Jump N' Ride

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Variant:

C12:black/turquoise

Duke - C12:black/turquoise
Duke - C13:black/coral
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Item-no. 14250-1204

OUR MOST SUCCESSFUL 5-BATTEN SAIL EVER IS BACK! COMBINED WITH THE LIGHT DONE RIGHT CONSTRUCTION AND ALL THE OTHER BUILD CONCEPTS DEVELOPED OVER THE PAST DECADE THE REINCARNATION OF THE DUKE IS SET TO BE THE NEW BENCHMARK FOR WIND-RANGE ORIENTED HANDLING SAILS.

Our most successful 5-batten sail ever came back with a bang in SS23, and for SS25 we have given it a facelift!


The DUKE combines our LIGHT DONE RIGHT construction and all the other build concepts developed over the past decade to set a new benchmark for wind-range oriented handling sails.


When it came to developing the DUKE, it was a 1.5 year project, with you, the final user always at the center of the development. As a starting point we involved “real” end-consumers who use these kinds of sails regularly and our surf centers to define a bucket list for the reincarnation of the DUKE, and here is the outcome and how we went about it:


Maximum wind range especially in changing and/or super gusty conditions.

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, we 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.


Superlight feeling in your hands but without falling apart after 1-2 seasons.

The reduced weight of 4-batten sails was the major reason for the disappearance of the 5-batten sails in the past decade. Fortunately, we have made some major construction improvements over the last 10 years. The outcome of this development was the LIGHT DONE RIGHT CONSTRUCTION which got introduced in 2022. By replacing the usual multilayer reinforcements with a single layer of high-quality fabric and introducing the ONE PIECE SLEEVE we were able to reduce the overall weight by 300g. Most important we are the only brand out there where these weight savings have been achieved without reducing the thickness of the film and XPly panels. Only this way we can still guarantee our unmatched 5 year warranty. Another issue when reducing the film thickness is that the sail becomes spongy as the energy fizzles out in the increased elongation. This leads to the sail feeling heavier in your hands. So in contrary to others our sails are not just lighter on the scale but especially in your hands on the water when you use them. Cause this is where it really counts!


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.


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.


Good lift and 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.


Maximum range of use

One of the greatest assets of the DUKE is its versatility. It’s pure extasy in bump & jump conditions on your freewave board or as a smaller sail for blasting around on your freeride board. The forward/up draft position makes it also very capable for classic and even new school freestyle tricks. And last but not least it’s a great sail for medium wave and/or jumping conditions especially in gusty or challenging wind conditions. So, the new DUKE is a real all- round high performance contender challenging any handling sail out there.


Straight forward and fast to rig

With all the features, markers and hints we have developed over the past 40 years it’s safe to say that there is no other sail which is faster or more precise to rig than a DUOTONE sail. This means even if you aren’t a pro who is rigging and trimming their sail every day you will still achieve the same correct trim. As only with the correct trim can you unlock 100% of the sail’s performance.


Similar feeling than your bigger Freeride/Performance sails

Another important factor is that all the sails in your quiver should have a similar feeling/behavior. This even counts for professionals as it usually takes even them a full day to get used and adjust their style to a sail which feels very different. The major reason why sails feel different is the position of the draft in the sail. Fortunately, also here the DUKE has got you covered as it features a very similar draft position to the vast majority of all modern freeride sails.


So, you see we have thrown our entire know-how and experience into the mix to create the most sophisticated Jump N’ Ride high performance sail ever.


Finally, the new DUKE comes in 2 optional constructions:

+ The regular DUKE features a 50% monofilm construction with all high load areas (foot, clew, top, luff) being beefed up with XPly.

+ The DUKE HD though is made entirely out of XPly to give you that extra peace of mind.

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!
VTS TAIL outhaul specs
Each sail carries individually defined visual indications for the correct outhaul extension (requires VTS TAIL boom).
iROCKET 2.0
Factory calibrated individual batten tensions using a torque wrench
AVAILABLE IN HD
Also available in a monofilm-free HD-construction
Duke - C12:black/turquoise
Wind Range
PLANING
Wind Range
STABILITY
Draft & Feeling
FORWARD / DIRECT
Draft & Feeling
CENTERED / SOFT
On-Off >< Drive
ON-OFF
On-Off >< Drive
DRIVE
Range Of Use
JUMPING
Range Of Use
DOWN THE LINE
Freestyle Ability
NEW SCHOOL
Freestyle Ability
CLASSIC
SIZE
BOOM MAX (CM)
VTS TAIL TENSION
LUFF MAX (CM)
VARIO/FIX TOP
BATTENS
WEIGHT (KG)
MAST TYPE (BEST/ALT.)
MAST GEO (BEST/ALT.)
MAST LENGTH (BEST/ALT.)
Best Size
4.2
154
Min +3 >< Max +5
380
Vario
5
3.00
PLATINUM / GOLD>SILVER
RDM/--
370/400
Best Size
4.5
158
Min +3 >< Max +5
390
Vario
5
3.10
PLATINUM / GOLD>SILVER
RDM/--
370/400
Best Size
4.7
164
Min +3 >< Max +5
404
Fix
5
3.20
PLATINUM / GOLD>SILVER
RDM/--
400/--
Best Size
5.0
166
Min +3 >< Max +5
412
Fix
5
3.30
PLATINUM / GOLD>SILVER
RDM/--
400/--
Best Size
5.4
170
Min +3 >< Max +5
434
Fix
5
3.40
PLATINUM / GOLD>SILVER
RDM/--
430/--
Best Size
5.8
178
Min +3 >< Max +5
440
Fix
5
3.50
PLATINUM / GOLD>SILVER
RDM/--
430/--
Best Size
6.2
182
Min +3 >< Max +5
452
Fix
5
3.60
PLATINUM / GOLD>SILVER
RDM/SDM
430/--
Best Size
6.7
190
Min +3 >< Max +5
466
Fix
5
3.70
PLATINUM / GOLD>SILVER
SDM/RDM
460/--

ATTENTION: since the mast geometry and length (= stiffness) depend on the sail design, size and luff curve the sails will NOT work with any masts outside the recommendations!

default
TechFeature

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

2+3 YEAR WARRANTY

Guaranteed quality – no other brand offers anything close to it. Keeping weight to a minimum is a great idea. But if necessary reinforcements are reduced too much, the product’s service life will automatically get shorter. DUOTONE has struck the perfect balance between weight and durability. To prove our dedication to ensuring durability and unique quality, almost all of our sails come with a 2+3 year warranty (excluding monofilm). To secure warranty claims fully, please remember to register at www.duotonesports.com straight after your purchase. Otherwise, only statutory warranty claims will be accepted. This is valid only for original owners.

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.

POLYESTER WEBBING ONLY

Eliminating stretch and loss of tension. If it’s good enough for safety harnesses, it’s good enough for windsurfers! We are 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.

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.

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.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

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.

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.

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 iBUMPER 2.0 now has a vinyl viewing window so that the lower edge of the mast can be identified. Once the perfect trim has been found, the optional Velcro patch can be used to “save” this position – saving time and ensuring maximum performance.

POLYESTER WEBBING ONLY

Eliminating stretch and loss of tension. If it’s good enough for safety harnesses, it’s good enough for windsurfers! We are 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.

TRIPLE TACK ROLLER 3.0

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

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.

VTS TAIL OUTHAUL SPECS

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

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. We calibrate each individual batten at the factory according to development specifications. And we don’t just leave it up to blind intuition either – all battens are adjusted to 100% accuracy using torque wrenches. We also apply soluble screw adhesive to the locknuts so that the tension cannot be altered. This means that the batten tension remains absolutely correct and will never have to be adjusted again. The batten key included with the sail is therefore only needed for fine tuning or in the unlikely event of a batten breakage.

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, we 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.

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.

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 breakage.

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 centre 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.

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.

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.

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.

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

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

TT TOP

Improved sail control at higher winds. Designer Kai Hopf originally designed the TT TOP for the WARP. The reduced, concave shape improves tension conditions for a more effective, three-dimensional top twist. This means the top twists not only horizontally, but also vertically under strong winds. By completely neutralising gusts of wind, the rig is kept steady in the rider’s hands, and thus works in a much larger range of winds.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

2+3 YEAR WARRANTY

Guaranteed quality – no other brand offers anything close to it. Keeping weight to a minimum is a great idea. But if necessary reinforcements are reduced too much, the product’s service life will automatically get shorter. DUOTONE has struck the perfect balance between weight and durability. To prove our dedication to ensuring durability and unique quality, almost all of our sails come with a 2+3 year warranty (excluding monofilm). To secure warranty claims fully, please remember to register at www.duotonesports.com straight after your purchase. Otherwise, only statutory warranty claims will be accepted. This is valid only for original owners.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

2+3 YEAR WARRANTY

Guaranteed quality – no other brand offers anything close to it. Keeping weight to a minimum is a great idea. But if necessary reinforcements are reduced too much, the product’s service life will automatically get shorter. DUOTONE has struck the perfect balance between weight and durability. To prove our dedication to ensuring durability and unique quality, almost all of our sails come with a 2+3 year warranty (excluding monofilm). To secure warranty claims fully, please remember to register at www.duotonesports.com straight after your purchase. Otherwise, only statutory warranty claims will be accepted. This is valid only for original owners.

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.

POLYESTER WEBBING ONLY

Eliminating stretch and loss of tension. If it’s good enough for safety harnesses, it’s good enough for windsurfers! We are 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.

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.

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.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

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.

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.

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 iBUMPER 2.0 now has a vinyl viewing window so that the lower edge of the mast can be identified. Once the perfect trim has been found, the optional Velcro patch can be used to “save” this position – saving time and ensuring maximum performance.

POLYESTER WEBBING ONLY

Eliminating stretch and loss of tension. If it’s good enough for safety harnesses, it’s good enough for windsurfers! We are 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.

TRIPLE TACK ROLLER 3.0

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

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.

VTS TAIL OUTHAUL SPECS

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

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. We calibrate each individual batten at the factory according to development specifications. And we don’t just leave it up to blind intuition either – all battens are adjusted to 100% accuracy using torque wrenches. We also apply soluble screw adhesive to the locknuts so that the tension cannot be altered. This means that the batten tension remains absolutely correct and will never have to be adjusted again. The batten key included with the sail is therefore only needed for fine tuning or in the unlikely event of a batten breakage.

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, we 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.

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.

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 breakage.

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 centre 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.

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.

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.

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.

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

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

TT TOP

Improved sail control at higher winds. Designer Kai Hopf originally designed the TT TOP for the WARP. The reduced, concave shape improves tension conditions for a more effective, three-dimensional top twist. This means the top twists not only horizontally, but also vertically under strong winds. By completely neutralising gusts of wind, the rig is kept steady in the rider’s hands, and thus works in a much larger range of winds.

XPLY PLUS

What would you prefer? Maximum puncture resistance and UV weathering resistance with minimum stretch? Or (theoretically) improved ripstop properties? We went with option A and developed the most durable laminate on the market. Because the factors of puncture resistance, durability and stretch evidently depend only on the thickness of the film used, we use only 150 or 100 micron thick films for our exclusive XPLY PLUS. In an extensive series of tests, we 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. This is also acknowledged by all the big surfing centres and rental equipment providers around the world, who place their trust in the unbeatable quality and longevity of our sails.

2+3 YEAR WARRANTY

Guaranteed quality – no other brand offers anything close to it. Keeping weight to a minimum is a great idea. But if necessary reinforcements are reduced too much, the product’s service life will automatically get shorter. DUOTONE has struck the perfect balance between weight and durability. To prove our dedication to ensuring durability and unique quality, almost all of our sails come with a 2+3 year warranty (excluding monofilm). To secure warranty claims fully, please remember to register at www.duotonesports.com straight after your purchase. Otherwise, only statutory warranty claims will be accepted. This is valid only for original owners.

TechFeature
Quote BERND FLESSNER (GERMAN WINDSURF LEGEND)

»POWER, STABILITY BUT STILL A SUPER LIGHT FEELING SAIL, THAT'S WHAT I EXPECT FROM A POWER WAVE AND FREEMOVE SAIL, ESPECIALLY IN DIFFICULT ONSHORE CONDITIONS. FOR ME THE NEW DUKE OFFERS ALL OF THIS AND SO MUCH MORE.«

— BERND FLESSNER (GERMAN WINDSURF LEGEND)
Quote MARCO LANG (PRODUCT MANAGER SAILS)

»CARVING A 360, SPINNING THROUGH A SPOCK OR BLASTING AROUND. FOR ME THE DUKE IS THE MOST JOYFUL SAIL FOR ALL KIND OF CONDITIONS. THE ADDITIONAL 5TH BATTEN GIVES ME GREAT STABILITY IN GUSTY CONDITIONS COMBINED WITH A MASSIVE WIND RANGE.«

— MARCO LANG (PRODUCT MANAGER SAILS)
Quote KAI HOPF (CHIEF SAIL DESINGER)

»INCORPORATING THE BATTEN FREE CENTER CONCEPT I'VE DEVELOPED FOR THE SUPER_HERO WAS THE BREAKTHROUGH IN THE DUKE DEVELOPMENT: HAVING A LARGER AREA AROUND THE BOOM WITHOUT BATTENS MAKES IT MUCH EASIER FOR THE WIND TO FILL OUT THE SAIL (= BETTER PLANING POWER) AND AVOIDS THE SAIL FROM BECOMING TOO STIFF.«

— KAI HOPF (CHIEF SAIL DESINGER)

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