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Cruisers

2012Harley-Davidson FXDF Dyna Fat Bob

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The 2012 Harley-Davidson FXDF Dyna Fat Bob is a middleweight cruiser that appeals to riders seeking classic styling with modern performance. Known for its distinctive fat 240mm rear tire, low-slung seat, and aggressive stance, it delivers a comfortable yet commanding ride. This bike balances raw Harley character with practical features like electronic instruments and fuel management, making it ideal for both urban cruising and highway touring.

Capacity: 1688.0 ccm
Engine: V-Twin, four-stroke
Gearbox: 6-speed
Dry weight: 305.3 kg
Seat height: 663 mm
Power: 86.0 HP (63.3 kW)

⇄ Compare with another bike ＋ Add to garage All model years ⚠ Recalls listed (1)

What’s new for the 2012 Harley-Davidson FXDF Dyna Fat Bob

vs the 2011

Spec	2011	2012
Engine capacity	1584.0 ccm (96.66 cubic inches)	1688.0 ccm (103.01 cubic inches)
Power	75.0 HP (55.2 kW)	86.0 HP (63.3 kW)
Torque	127.0 Nm (13.0 kgf-m or 93.7 ft.lbs)	135.6 Nm (13.8 kgf-m or 100.0 ft.lbs) @ 3500 RPM
Wet weight	—	320.2 kg (705.9 pounds)
Fuel capacity	19.30 litres (5.10 US gallons)	18.90 litres (4.99 US gallons)
Front suspension	49mm with polished aluminium fork triple clamp	49 mm with polished aluminum fork triple clamp and dual-rate springs
Rear suspension	Fully Covered, Coil-over shock	Coil-over shock. Mild steel, rectangular tube sections, stamped junctions; MIG welded swingarm.
Front brakes	Double disc. 4-piston	Single disc. 4-piston fixed. Optional ABS.
Rear brakes	Single disc. Single piston	Single disc. 2-piston torque-free floating. Optional ABS.

Other years 2008 2009 2010 2011 2012

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering45%

City riding55%

Daily riding60%

Touring45%

Two-up55%

Track15%

Best for: Built for style-driven boulevard cruising and short blasts rather than outright speed or long-distance touring.
Built for: A muscular, fat-tired custom cruiser that trades cornering agility for big V-twin torque and unmistakable Dyna attitude.
Not ideal for: Not a good fit for riders seeking sharp cornering performance, off-road capability, or dedicated long-haul touring comfort.

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

Will it fit you?

Worked out in your browser - nothing is sent to us

Your height

Inseam (optional)

Units

At 663mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2012 Harley-Davidson FXDF Dyna Fat Bob, 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: 86.0 HP (63.3 kW)
CO2 Emissions: 130 CO2 g/km
Torque: 135.6 Nm (13.8 kgf-m) @ 3500 RPM
Engine type: V-Twin, four-stroke
Fuel consumption: 5.60 litres/100 km (17.9 km/l)
Power/weight ratio: 0.2817 HP/kg (dry)
Bore x stroke: 95.3 x 111.3 mm
Compression: 9.2:1
Cooling system: Air
Fuel system: Injection
Starting: Electric
Lubrication system: Pressurized, dry-sump

Transmission

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

Dimensions & weight

Wheelbase: 1618 mm
Overall length: 2329 mm
Seat height: 663 mm
Dry weight: 305.3 kg
Wet weight: 320.2 kg
Fuel capacity: 18.90 litres
Ground clearance: 125 mm
Oil capacity: 2.80 litres

Chassis & suspension

Frame: Mild steel, tubular frame; rectangular section backbone; stamped, cast, and forged junctions; forged fender supports; MIG welded
Front suspension: 49 mm with polished aluminum fork triple clamp and dual-rate springs
Rear suspension: Coil-over shock. Mild steel, rectangular tube sections, stamped junctions; MIG welded swingarm.
Front wheel travel: 127 mm
Rear wheel travel: 54 mm
Rake (fork angle): 29.0°
Trail: 125 mm

Brakes & wheels

Front brakes: Single disc. 4-piston fixed. Optional ABS.
Front brakes diameter: 300 mm
Rear brakes: Single disc. 2-piston torque-free floating. Optional ABS.
Rear brakes diameter: 292 mm
ABS: Optional
Front tyre: 130/90-B16
Rear tyre: 180/70-B16

Other

Color options: Vivid Black, Big Blue Pearl, H-D Orange, Black Denim
Warranty: 24

Specs last verified against published sources: October 2026.

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	2008	2009	2010	2011	2012
Capacity	1573 cc	1584 cc	1584 cc	1584 cc	1688 cc
Dry weight	304 kg	305 kg	305 kg	305 kg	305 kg
Seat height	688 mm	663 mm	663 mm	663 mm	663 mm
Fuel capacity	19.3 L	19.3 L	19.3 L	19.3 L	18.9 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

Safety Recalls

⚠ 1 recall may apply

SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDERDec 2014 · 14V794000

Harley-Davidson Motor Company (Harley-Davidson) is recalling certain model year 2012 FXST103, FLSTC, FLSTC103, FLSTF, FLSTF103, FXDL, FXDWG, FXDWG103, FXDC, FXDB, FLSTN, FLSTN103, FLSTC103Shrine, FLSTFB, FLSTFB103, FXS, FXS103, FLS, FLS103, FLD, FLD103, FXDF, and FXDF103 Dyna and Softail motorcycles manufactured August 22, 2011, through February 24, 2012. In the affected motorcycles, the threads for the brake line banjo bolt in the front brake master cylinder may corrode.

Risk: If the threads corrode, a sudden loss of brake fluid could result, causing a loss of the front brakes, and increasing the risk of a crash.

Remedy: Harley-Davidson will notify owners, and dealers will flush and inspect the front brake master cylinder and, if necessary, replace the master cylinder, free of charge. The recall is expected to begin on January 22, 2015. Owners may contact Harley-Davidson customer service at 1-800-258-2464. Harley-Davidson's number for this recall is 0163 and 0164.

These recalls cover some 2012 bikes of this model. Whether one applies to a specific bike, and whether the repair has already been done, depends on its VIN — check your VIN with NHTSA or ask a dealer.

Source: NHTSA. View all Harley-Davidson recalls →