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Astus 20.5

2018 March 1

This lightweight trimaran has speed in a pocket-cruising package

Astus Boats out of France has a niche market. It has been very successful building a series of small, collapsible, very lightweight trimarans. These are the kinds of boats you could easily tow behind a small car like my Subaru. 

Its newest model is the 20.5 and it was designed by  VPLP design in collaboration with Jean-Hubert Pommois. The idea is that you can have a high-performance racing/cruising trimaran in a very small package. The company offers two versions. One is an infusion-method-built version displacing 880 pounds. The other version is a noninfusion laminate displacing 990 pounds. Various other options are available to let you tailor your little tri to just your specs.


Using the infusion-built version, the D/L is 54.22. If you go noninfusion the D/L rises to 61.02. That is still very light. Beam with the arms collapsed, (they appear not to fold)  is 8.13 feet. Amas in place, the beam max is 14 feet 9 inches. The main hull is flared, the marketing material calls it “tulipped” to give more volume below while retaining a narrow BWL. The bow profile shows negative rake with the tip nipped off for styling points. Draft with the board down is 4 feet 1 inch and with the board up it’s 1 foot.

It’s not for me to tell you what you can cruise on, but I am too tall to be comfortable below on this boat. The renderings show two people laying down. I’m a bit skeptical. There is a small sitting area that would work for one person but two people would require some gymnastics that I’d rather not describe, SAILING being a family magazine. Of course you can cruise this boat. Go right ahead.

The rig is big with a SA/D for the infusion, “sport” model at 39.78. That should scoot you right along. Even if you go with the “Leisure” model you get a SA/D of 34.63 and that’s still a lot of sail area. The biggest difference is the “sport” model has a square-topped mainsail. There is a carbon rig option.

I can see blasting around my bay on this little trimaran. I could give my pal Doug and his Farrier 27 a race.

LOA 19.5’; LWL  19.4’; Beam 14’9”,collapsed 8’1”; Draft board down 4’1”, board up 1’; Displ. 880 lbs.; Sail area  219 sq. ft. ; Sail area sport 247 sq. ft.; SA/D 34.63; SA/D sport 39.78;  D/L 54.22; L/B ; Auxiliary 4.5-hp outboard; Fuel n/a; Water n/a

Our best estimate of the sailaway price: $42,500

WindRider International

5544 Malibu Dr.

Edina, MN 55436