BoatsJ Boats J/70

J Boats J/70

Fractional Sloop · Fin w/transom Hung Rudder · First built 2012

A high-performance fractional sloop designed by Alan Johnstone, with over 1,100 units delivered for one-design racing

Designed by Alan Johnstone.

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

See her sail

The J Boats J/70, on the water

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

Footage from Quantum Sails

Is it for you?

Character

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

TrailerableBeam 2.25 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 812 kg of hull, so roughly 1,400 kg on a trailer: check that against your own towing rating.
LivelyComfort 9Sea-kindly
CoastalCapsize 2.43Bluewater
LightD/L 93Heavy
EasygoingSA/D 24.6Powered-up
TenderBallast 35%Stiff

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

  • Lighter than ~90% of boats her size on file
  • Draws more than ~81% of boats her size on file
  • Narrower than ~84% of boats her size on file

Compared with 1090 boats of the same type within a quarter of her length.

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen 4 times across 3 channels of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

On the water

The J Boats J/70 on video

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
35.1%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
24.6
Displacement / length
93.2
Comfort ratio
9.1
Capsize screening
2.43
Hull speed
6.1 kn
Pounds / inch immersion
540
Hull
Hull type
Fin w/transom hung rudder
Construction
Fiberglass
Ballast type
Lead
Production
Years built
First built 2012
Units built
1100
Designer
Alan Johnstone
Builder
J Boats

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.

J J/77.04 mSame hull familyNear-identical lengthA 2024 fractional sloop with a shallow 1.16m draft and a high 23.55 sail-area-to-displacement ratio for responsive daysailing
Bavaria Yachts 6066.50 mSame hull family0.4 m shorterA lightweight 6.5-meter fractional sloop with a high sail-area-to-displacement ratio for spirited coastal sailing
J Boats Tillotson Pearson J/808.00 mSame hull family1.1 m longerA 1992 fractional sloop with a high 26.59 sail area-to-displacement ratio, engineered for rapid, agile performance
Catalina Yachts 22 MKII7.26 mSame hull family0.3 m longerAn upgraded 1995 iteration of the classic trailerable cruiser, featuring a fin keel and transom-hung rudder
Borge Bringsvaerd Bb116.18 mSame hull family0.8 m shorterA Norwegian-built classic with an active class association that has raced continuously since the 1960s
J Boats Tillotson Pearson J/247.32 mSame hull family0.4 m longerThe world's most popular one-design keelboat, featuring a light 1406kg displacement for responsive, agile handling

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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