BoatsRio 20

Rio 20

Masthead Sloop · Fin w/transom Hung Rudder · First built 1975

A lightweight, high-performance masthead sloop designed by Roberto Barros with a lively sail area-to-displacement ratio

Designed by Roberto Barros, built by Multiglass.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/transom Hung Rudder

See her sail

The Rio 20, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Hashtag Sal

Is it for you?

Character

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

TrailerableBeam 2.16 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 800 kg of hull, so roughly 1,400 kg on a trailer: check that against your own towing rating.Shoal draftDraws 1.05 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her light displacement on a beamy beam gives 11 — a quick, lively motion that feels every wave.

Comfort ratio 11
CoastalBluewater

At 2.35 she sits above the 2.0 line — beamy for her weight, and happiest coastal.

Capsize screening 2.35
LightHeavy

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

Displacement / length 179
EasygoingPowered-up

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

Sail area / displacement 28.3
TenderStiff

37% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 37%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

  • Lighter than ~79% of boats her size on file
  • Narrower than ~76% of boats her size on file

Compared with 563 boats of the same type within a quarter of her length.

What the fleet has seen

The Rio 20, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Rio 20 is a 6.1-meter masthead sloop designed by Roberto Barros and built by Multiglass in Brazil since 1975. It features a fin keel with a transom-hung rudder, a beam of 2.2 meters, a draft of 1.1 meters, and a displacement of 800 kg. Barros, known as "Cabinho," designed the Rio 20 and other boats like the Paraty 1 to be accessible for amateur construction, aiming to popularize sailing in Brazil. His design philosophy prioritizes self-reliance and traditional skills over complex modern technology, reflecting his own 1965 offshore passage from Rio de Janeiro to Polynesia on a self-built 25-foot boat.0:15

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Basemap © Wikimedia Commons · CC BY-SA 4.0

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
37.5%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
28.3
Displacement / length
178.5
Comfort ratio
11.5
Capsize screening
2.35
Hull speed
5.4 kn
Pounds / inch immersion
415
Hull
Hull type
Fin w/transom hung rudder
Construction
Fiberglass
Production
Years built
First built 1975
Designer
Roberto Barros
Builder
Multiglass

Boats like this, on the water

More boats like her, on the water

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.

Bavaria Yachts 6066.50 mSame hull family0.4 m longerA lightweight 6.5-meter fractional sloop with a high sail-area-to-displacement ratio for spirited coastal sailing
Gilbert Marine Tequila7.20 mSame hull family1.1 m longerA Philippe H. Harle-designed masthead sloop that claimed the 1971 Quarter Ton Cup with her prototype performance
Abbott Boats Inc. Yngling6.35 mSame hull family0.3 m longerA 6.35-metre fractional sloop that served as the Olympic class for women sailors from 2004 through 2008
J Boats Tillotson Pearson J/226.86 mSame hull family0.8 m longerA high-performance fractional sloop with a high sail-area-to-displacement ratio designed for competitive one-design racing
J Boats Tillotson Pearson J/247.32 mSame hull family1.2 m longerThe world's most popular one-design keelboat, featuring a light 1406kg displacement for responsive, agile handling
J Boats J/706.93 mSame hull family0.8 m longerA high-performance fractional sloop designed by Alan Johnstone, with over 1,100 units delivered for one-design racing

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

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The fleet has more to say

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