BoatsExtreme 40

Extreme 40

Catamaran, twin daggerboards · Frac. Sloop (Rotating Spar) · First built 2005

A rotating-spar catamaran built as a strict one-design class for the iShares Cup and high-speed stadium racing

Designed by Yves Loday, built by Marstrom Composites.

LOA
Beam
Displacement
Hull type
Catamaran Twin Dbrd.

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LightHeavy

19 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 19
EasygoingPowered-up

81.6 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 81.6
  • Lighter than ~98% of boats her size on file

Compared with 250 boats of the same type within a quarter of her length.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Rig & sail area
Rig
Frac. Sloop (Rotating Spar)
Ratios
SA / displacement
81.6
Displacement / length
19.2
Hull
Hull type
Catamaran Twin Dbrd.
Construction
Fiberglass
Production
Years built
First built 2005
Units built
19
Designer
Yves Loday
Builder
Marstrom Composites

Boats like this, on the water

Nobody has filmed this one — but these are close.

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Astrea 4212.58 mSame hull family0.4 m longerA Berret-Racoupeau designed catamaran with a shallow 1.25m draft, built for stable cruising between 2018 and 2025
The Decision That Saved Our Night Offshore | Ep 67:48from Sailing Catamaran Tumbleweed
Lagoon 3911.70 mSame hull family0.5 m shorterA VPLP-designed catamaran featuring a mast stepped further aft for easier handling and a balanced sail plan
How to be a skipper in Greece?10:46from Podcast Maré Sonora ®
Fp 4112.10 mSame hull familyNear-identical lengthA 2025 catamaran successor to the Astrea 42, featuring a 1.35m draft and the choice of diesel or electric propulsion
Fountaine Pajot 41 Review – The Perfect 41ft Hybrid-Electric Catamaran for Cruising Couplesfrom Practical Sailor
Fastcat 39512.01 mSame hull family0.2 m shorterA high-performance fractional catamaran from Simonis-Voogd, featuring a high sail-area-to-displacement ratio for speed
Velho Jack and Angelita: madness and overcoming challenges2:20from Podcast Maré Sonora ®
Manta 4012.09 mSame hull familyNear-identical lengthAn Erik LeRouge-designed performance catamaran with a high sail area-to-displacement ratio for spirited cruising
42' Manta Catamaran FULL SAILBOAT TOUR0:02from Adventureman Dan
Dragonfly 4012.40 mSame hull family0.2 m longerA high-performance swing-wing trimaran featuring carbon-fiber construction and a high sail-area-to-displacement ratio
This is what the MOST MODERN BOATS look like with CHEZ TEAM [Ep.90] The Bohemia Voyage7:25from El Viaje de Bohemia

The family

Boats like this

Nearby designs by size, type, and era — worth a look alongside her.

Farr 40 One-DesignA Bruce Farr-designed fractional sloop built for pure one-design racing with a high sail-area-to-displacement ratioX Yachts X-40A 12.19-metre cruiser with a 21.5 SA/D ratio, sharing the IMX-40 hull for offshore-capable performanceX-Treme 25A Lutra-designed fractional sloop with a high power-to-weight ratio and lifting keel for high-performance racingX Yachts Imx-40A high-performance fractional sloop by Niels Jeppesen, built for offshore racing with CE Category A certificationXr 41A high-performance fractional sloop with a powerful sail-to-displacement ratio, engineered for speed and modern racing

Keep looking

Nothing filmed of this one yet

Two ways to keep looking — both search what the fleet has actually recorded.

Search the fleet for boats like thisAsk the fleet about the Extreme 40

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