Cruisers

2010Harley-Davidson FLSTF Softail Fat Boy

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The 2010 Harley-Davidson FLSTF Softail Fat Boy is an iconic cruiser that appeals to riders seeking classic American styling with modern performance. Powered by a 1584cc V-twin engine delivering robust low-end torque, it's renowned for its distinctive fat tires, chrome details, and commanding presence on the road. Built for leisurely cruising and highway comfort rather than aggressive riding.

Capacity: 1584.0 ccm
Engine: V-Twin, four-stroke
Gearbox: 6-speed
Dry weight: 313.0 kg
Seat height: 690 mm
Power: 75.0 HP (55.2 kW)

⇄ Compare with another bike All model years

What’s new for the 2010 Harley-Davidson FLSTF Softail Fat Boy

vs the 2009

Spec	2009	2010
Torque	120.0 Nm (12.2 kgf-m or 88.5 ft.lbs)	125.0 Nm (12.7 kgf-m or 92.2 ft.lbs) @ 3500 RPM
Wet weight	323.9 kg (714.1 pounds)	not listed
Seat height	698 mm (27.5 inches)	690 mm (27.2 inches)
Fuel capacity	18.90 litres (4.99 US gallons)	19.70 litres (5.20 US gallons)
Front suspension	—	41.3mm telescopic, beer can covers
Rear suspension	—	Hidden, horizontal-mounted, coil-over
Front brakes	Single disc. 4-piston calipers	Single disc. 4-piston
Rear brakes	Single disc. 2-piston torque-free calipers	Single disc. 2-piston

Other years 2007 2008 2009 2010 2011 2012

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering35%

City riding55%

Daily riding60%

Touring60%

Two-up65%

Track10%

Best for: Built for laid-back boulevard cruising and image-driven riding rather than outright performance.
Built for: A muscular, torque-rich cruiser icon that rewards relaxed throttle rolls and a laid-back riding style over aggressive cornering.
Not ideal for: Not the right choice for riders seeking sharp cornering agility, off-road capability, or high-speed sport performance.

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 690mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2010 Harley-Davidson FLSTF Softail Fat Boy, with a cramped knee angle of around 75 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 →

Full specifications

Engine

Capacity: 1584.0 ccm
Power: 75.0 HP (55.2 kW)
Torque: 125.0 Nm (12.7 kgf-m) @ 3500 RPM
Engine type: V-Twin, four-stroke
Power/weight ratio: 0.2396 HP/kg (dry)
Bore x stroke: 95.3 x 111.1 mm
Compression: 9.2:1
Cooling system: Air
Fuel system: Injection
Starting: Electric

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Belt
Clutch: 9-plate, wet

Dimensions & weight

Wheelbase: 1635 mm
Overall length: 2396 mm
Seat height: 690 mm
Dry weight: 313.0 kg
Fuel capacity: 19.70 litres
Ground clearance: 130 mm
Oil capacity: 3.10 litres

Chassis & suspension

Frame: Mild steel tubular frame; rectangular section backbone; stamped, cast, and forged junctions; forged fender supports; MIG welded
Front suspension: 41.3mm telescopic, beer can covers
Rear suspension: Hidden, horizontal-mounted, coil-over
Front wheel travel: 97 mm
Rear wheel travel: 91 mm
Rake (fork angle): 31.0°
Trail: 147 mm

Brakes & wheels

Front brakes: Single disc. 4-piston
Front brakes diameter: 292 mm
Rear brakes: Single disc. 2-piston
Rear brakes diameter: 292 mm
Rear tyre: 200/55-R17

Other

Color options: Vivid Black, Scarlet Red, Brilliant Silver Pearl, Flame Blue Pearl, Black Ice Pearl

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	2007	2008	2010	2011	2012
Capacity	1573 cc	1573 cc	1584 cc	1584 cc	1688 cc
Dry weight	315 kg	315 kg	313 kg	313 kg	315 kg
Seat height	698 mm	698 mm	690 mm	690 mm	635 mm
Fuel capacity	18.9 L	18.9 L	19.7 L	19.7 L	18.9 L