Cruisers

2015Harley-Davidson Softail Fat Boy

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The 2015 Harley-Davidson Softail Fat Boy is an iconic cruiser designed for riders seeking classic American style and commanding road presence. Known for its muscular styling, low-slung seating position, and accessible 49-cubic-inch engine, it delivers accessible performance with authentic Harley character. Best suited for cruiser enthusiasts who prioritize presence and heritage over sporty agility.

Capacity: 1688.0 ccm
Engine: V-Twin, four-stroke
Gearbox: 6-speed
Dry weight: 313.0 kg
Seat height: 635 mm
Power: 77.8 HP (56.8 kW) @ 5250 RPM

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What’s new for the 2015 Harley-Davidson Softail Fat Boy

vs the 2014

Spec	2014	2015
Power	103.0 HP (75.8 kW)	77.8 HP (56.8 kW) @ 5250 RPM
Torque	133.8 Nm (13.6 kgf-m or 98.7 ft.lbs) @ 3000 RPM	132.0 Nm (13.5 kgf-m or 97.4 ft.lbs) @ 3250 RPM
Front brakes	Double disc. 4-piston	Double disc. ABS. 4-piston.
Rear brakes	Single disc. 2-piston	Single disc. 2-piston.

Other years 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering30%

City riding55%

Daily riding60%

Touring55%

Two-up60%

Track10%

Best for: Built for style-driven cruising and boulevard presence rather than outright performance or long-distance efficiency.
Built for: A bold, muscular cruiser with iconic Fat Boy looks, a thumping V-twin character, and a commanding, laid-back riding stance.
Not ideal for: Not the right choice for riders seeking sharp cornering agility, off-road capability, or lightweight nimble handling.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 635mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2015 Harley-Davidson Softail Fat Boy, with a cramped knee angle of around 70 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 750 mm or under — Short Kings →

Find bikes that fit your height →

Range and running costs

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Units

Currency

Fuel per litre

Riding a year

Based on the maker's published fuel consumption and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.

Full specifications

Engine

Capacity: 1688.0 ccm
Power: 77.8 HP (56.8 kW) @ 5250 RPM
CO2 Emissions: 130 CO2 g/km
Torque: 132.0 Nm (13.5 kgf-m) @ 3250 RPM
Engine type: V-Twin, four-stroke
Fuel consumption: 5.60 litres/100 km (17.9 km/l)
Power/weight ratio: 0.2486 HP/kg (dry)
Bore x stroke: 98.4 x 111.3 mm
Compression: 10.0:1
Cooling system: Air
Fuel system: Injection
Starting: Electric
Valves per cylinder: 2

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Belt
Clutch: Multi-plate with diaphragm spring in oil bath

Performance

Top speed: 155.0 km/h (96.3 mph)

Dimensions & weight

Wheelbase: 1638 mm
Overall length: 2395 mm
Seat height: 635 mm
Dry weight: 313.0 kg
Wet weight: 330.2 kg
Fuel capacity: 18.90 litres
Ground clearance: 130 mm
Oil capacity: 3.30 litres

Chassis & suspension

Front suspension: Telescopic fork
Rear suspension: Twin shocks
Rake (fork angle): 31.0°
Trail: 147 mm

Brakes & wheels

Front brakes: Double disc. ABS. 4-piston.
Rear brakes: Single disc. 2-piston.
ABS: Yes
Front tyre: 140/75-R17
Rear tyre: 200/55-R17

Other

Color options: Black Magic, Mysterious Red Sunglo, Amber Whiskey/Vivid Black, Superior Blue, Brilliant Silver Pearl, Vivid Black /Blackened Cayenne Sunglo, Brilliant Silver Pearl, Vivid Black

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	1998	2003	2009	2014	2015	2019
Capacity	1338 cc	1450 cc	1584 cc	1688 cc	1688 cc	1746 cc
Dry weight	284 kg	284 kg	284 kg	313 kg	313 kg	304 kg
Seat height	654 mm	654 mm	654 mm	635 mm	635 mm	675 mm
Fuel capacity	—	—	—	18.9 L	18.9 L	18.9 L