Duotone Ultra Grip (Quad) (SB, incl. fin)

Unleash your potential. Built in FULL CUSTOM PVC-WOOD Technology, designed with Duotone's own AI_BOARD_3D software, which enables us to integrate unprecedented complex shaping tasks. The ULTRA GRIP makes high-end wave boards affordable! Similar to what we have achieved with the SUPER_HERO D/LAB sails Duotone's goal was to create real game changers with Duotone's new wave board range.What we had learned from the SUPER_HERO D/LAB development is that you need to work on all aspects to really make a decisive improvement.Switching Duotone's board technology from the industry-standard semi custom technology to Duotone's exclusive FULL CUSTOM PRODUCTION marked the foundation for all the rest to come (see TECH AND SHAPE DETAILS below for details). Because this technology lifted Duotone's weight vs. strength ratio to a whole new level. And it finally allowed us to make every single prototype in the factory like we are doing with Duotone's sails since over 30 years. Because the best prototype is worth nothing if it can't be reproduced or feels different due to different materials, processes or weight.To achieve a similar step up in the 3D design we decided to get Duotone's own CAD program written. Compared to the industry-standard Shape3D software Duotone's AI_BOARD_3D program is much more accurate and lets us perform even super complex shaping tasks like the brand-new SYNCED CURVES CONCEPT.DESIGN GOALS >> SHAPE DETAILS Duotone's main goals were to create designs which have a maximum range of use and are easier (less exhausting) plus more radical on the wave.Basically we wanted to create a more stable platform which is great for getting going and going over the white water. But at the same time the boards should turn even more radical when going down the line, which are opposing features you usually can't combine.Here are the 3 major shape details Duotone's team has developed over the last 2,5 years (see TECH AND SHAPE DETAILS below for all other details): STABLE YET RADICAL CONCEPTOur wave boards are 1-2cm wider than most other boards. The increased width results in a more stable platform. This makes Duotone's wave boards as stable and energy-saving as a 5 liter bigger board while drifting/floating and going over white water. Most importantly the additional width leads to an increased outline curve. This improves the maneuverability which makes the board turn as radical as a 5 liter smaller board. The result is an unbeatable broad range of use.3-STAGE ROCKERUnlike the usual continuous rocker curve, Duotone's entire shape concept is based on a segmented rocker line. This accounts for the fact that the top- and bottom turn are two entirely different maneuvers. While you initiate the bottom turn more over your front foot (depending on the size of the wave) the top turn is only sailed over the back foot. This change in posture is the biggest challenge, especially when learning to wave ride - which becomes much easier with Duotone's 3-STAGE ROCKER.The straight rocker section in-between the front- and back straps creates a super stable sailing stance/platform so that you re in perfect sync with your board going out or on the wave when switching between bottom- and top turn.The nose rocker starts just in front of the front straps which helps to engage the front part of the rail when leaning forward on the bottom turn.KICKSTARTER TAIL: The tail rocker behind the back strap remains very moderate until the last 4-5cm from the tail where it transforms into a progressive tail-kick. This tail-kick generates a perfect water release and in combination with the flat rocker line results in a kickstarter-like acceleration as soon as you push a bit with your back-foot. Plus the tail-kick obviously allows for super tight top turns when snapping back the board with your back-foot.SYNCED CURVES CONCEPT (rocker>< windy Euro wavesIdeal for Maui, Capetown, Brittany, Cabo Verde, Ireland, Chile, Mauritius B. GRIP 3Focus Euro waves >< logo-high ground swellIdeal for Klitm ller, Canarias, North Sea, KanahaYOUR NEW ULTRA GRIP IS READY AND WAITING FOR YOU TO UNLEASH YOUR POTENTIAL!

Video Review

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Key Features

FULL CUSTOM PVC-WOOD TECHNOLOGY: Duotone's most price attractive boards made in FULL CUSTOM CONSTRUCTION
UNRIVALED BROAD RANGE: Revolutionary new shape concept: as stable and energy-saving as a 5 liter bigger board but yet as radical as a 5 liter smaller board on the wave.
AI_Board_3D: We use Duotone's own exclusive 3D CAD software. Apart from being much more accurate and faster, complex 3D design tasks such as Duotone's ground-breaking SYNCED CURVES CONCEPT would otherwise have been simply impossible to realize.
Exclusive Board Production: All Duotone's boards are CNC shaped now in Duotone's exclusive factory to guarantee superior weight vs. strength ratio, quality and accuracy.
Focussed World Cup wave designs: The ULTRA GRIP is designed to work all around the globe with focus on groundswell up to windy Euro wave conditions.
Exclusive Fin Production: All Duotone's fins are produced in Duotone's exclusive factory now. Instead of using one technology for all Duotone's fins we are using 3 different technologies according to the fin length and range of use.

Tech Features

Straps & Pads

Duotone Premium Strap

• High-quality closed-cell neoprene for maximum longevity

• Black Lycra coating for comfort and durability

• Measurement markings for quick setup and repeatable sizing

• Board-specific attachments:

   

  • World Cup boards → double-screw plugs for anti-twist, most direct connection

  • Other boards → single-screw plugs for quicker repositioning + a little “give” for comfort

   

Duotone Premium Strap 2.0 (new design)

• 20% lighter

• Reduced elongation for a more direct connection + safety

• Improved pre-forming → faster, easier assembly

Duotone Pro Pads

• 8–10 mm duo-density EVA (board dependent)

• Heat-pressed diamond groove pattern for grip + EVA protection

• Colours chosen to resist dirt and UV fading

• Excellent shock absorption and control

Deck Shapes

• Reduced Dome Deck → stable stance, especially in drift & ride conditions

• Flat Spot Deck → flat centre for stability outside straps, domed under straps for comfort

Rail Shapes

• Thinned-out rails (Quad boards) → max drive in bottom turns

• Slightly thinned rails (Thruster boards) → looser, slashier turns

• Positive Rail Concept → minimum radius to prevent burying and maintain grip

• Hawaiian Tail Rails → square apex adds lateral resistance, avoids tail drag

• Wave Tuck → increased tuck line for drive in bottom turns, softer edge for smoother ride

Outlines

• Quad boards → ~6 cm longer, narrower nose, swallow tail → more curved rail outline for grip balance

• Thruster boards → ~6 cm shorter, wider nose, swallow tail → more parallel outline for slashy feel

• Stable Yet Radical Concept → wider platform = stability of a +5L board, manoeuvrability of a −5L board

Rocker Lines

• Quad → slightly more nose & tail rocker, tail rocker balances grip of 4 fins

• Thruster → “Disconnected Rocker”: flatter centre + progressive V tail → faster, early planing, controlled release

• 3-Stage Rocker

   

  1. Flat section between straps = stable stance

  2. Nose rocker engages rail on bottom turn

  3. Tail-kick for snap top turns + explosive acceleration

   

Bottom Shapes

• Progressive double-concave V (front to back) → balance of performance, control, and manoeuvrability

• Tail channel (Thruster) → extra grip in turns

• Advanced concave transitions: V → flat double-concave → single-concave → flatter centre rocker with rail rocker lift

Fin Configurations

• Quad → maximum grip and drive (side/side-off conditions, lighter riders, strong currents)

• Thruster → earlier release, looser turning (side/side-on conditions)

Mini Side Slot Boxes

• Plug & play, no adjustments → lighter + simpler setup

• Centre fin handles all tuning

Plug & Shred System

• Fin/mast track adjustability limited to 10 mm → lighter, foolproof setup

• PRO / CONTROL markings for clear trim guidance

Tail Designs

• Squash Tail → versatile, grip + manoeuvrability, rounded corners for hold like a pin but looser

Mast Track

• Mini Mast-Track → lighter nose, prevents misplacement, enough adjustment for all sails and styles

Construction

Full Custom CNC Technology (D/LAB)

• CNC-milled EPS blocks (no mould shaping)

• Single Process Technology → each step done individually (stronger + lighter)

• Variable PVC plate thickness → tuned to stress zones

• Over 60 components per board (≈20% more than Premium Sandwich)

• High-end composites:

   

  • High-strength & high-modulus carbon (F1, aerospace, Platinum SLS)

  • Innegra → Kevlar-like tensile strength, stiffer, best dent resistance

  • S-Glass → 10–20% stiffer, higher tensile strength

  • DUOTONE Sentex® resin → lighter, reinforced with nano-spheres

   

Discipline-Specific Flex Construction

• Falcon (Racing) → super stiff for max acceleration + top speed

• Grip (Wave) → more Innegra & S-Glass for impact resistance + controlled flex

• Carbon reinforcements for explosive acceleration + spring-back

• Each board size = unique layup for true custom tuning

Result:

• Up to 500 g lighter than SLS boards

• Up to 1 kg lighter than semi-custom production boards

• Same weight as custom boards, but with full Duotone production consistency

• Durability intact thanks to Light Done Right design motto

Innovation & Design

AI_Board_3D Software

• Proprietary CAD with AI verification → unmatched precision

• Enabled Synced Curves Concept

Synced Curves Concept

• Outline, rocker, and rail curves fully synchronised

• Easier front-foot bottom turns

• More radical back-foot top turns

• Included in all 2026 boards

Tech Spec