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J108 is a Fast cruising sailboat built by J/Boats and designed by Rod Johnstone. Her first hull was built in 2011 with an overall lengh of 11.25 m or 36.11 ft long and a Keel stepped mast mast configuration.

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J108 Sailboat Specifications​


Overall Length (LOA) m / ft11.25 m / 36.11 ft
Builder(s)J Boats Tillotson Pearson
Designer(s)Rod Johnstone
BrandJ Boats
categoryFast cruising sailboat
CountryUnited States
Hull TypeMonohull
First Hull Built2011
Last Hull BuiltDiscontinued
AppendagesCenterboard pivoting centerboard in the keel
HelmSingle helm wheel
RudderTwin spade rudders
CockpitClosed aft cockpit
Ballast TypeCast iron
Rigging TypeSloop Marconi fractional
Mast LayoutKeel stepped mast
Number of Head(s)1
Freshwater Tank Capacity lt/gal130 L / 34.3 gal
Ballast Ratio0.39


Overall Length (LOA) 11.25 m / 36.11 ft
Hull Length10.75 m / 35.4 ft
Waterline Length (LWL)9.3 m / 30.6 ft
Beam (width)3.51 m / 11.6 ft
Draft2.1 m / 6.11 ft
Light Displacement (MLC) 5180 kg / 11420 lb
Ballast Weight2000 kg / 4409 lb


Critical Hull Speed7.40 knots
Displacement-Length Ratio (DLR)182
Ballast Ratio0.39
Upwind Sail Area to Displacement17.94 m²/T / 193 ft²/T
Downwind Sail Area to Displacement41.92 m²/T / 451 ft²/T

Above Deck

Mast LayoutKeel stepped mast
Rotating SparsNo
Number of Levels of Spreaders2
Spreaders AngleSwept-back
Spars ConstructionAluminum spars
Standing RiggingSingle-strand (ROD)
Upwind Sail Area53.7 m² / 578 ft²
Downwind Sail Area125.5 m² / 1351 ft²
Mainsail Area28.5 m² / 307 ft²
Genoa Area25.2 m² / 271 ft²
I44.6 ft * 13.56 m
J13.4 ft * 4.05 m
P41.5 ft * 12.62 m
E14.10 ft * 4.52 m

Engine Room

Engine(s)1 inboard engine
Engine(s) Power28 HP
Fuel typeDiesel
Fuel Tank Capacity95 L / 25.1 gal

Below Deck

Fridge Capacity90 L / 23.8 gal