2012 Harley-Davidson Dyna FXDF Fat Bob

The Harley-Davidson Dyna FXDF Fat Bob comes with a pretty unique name, but what’s more unique than its tag is the bike itself. This custom cruiser is made from the stuff that riders of all shapes and sizes absolutely crave.

With forward-mounted foot controls, a drag-style handlebar, and a sleek, two-up seat, the Fat Bob motorcycle creates an aggressive riding position that commands respect wherever it goes. Though it looks the part of a ’fat’ cruiser, the Dyna Fat Bob’s characteristics emphasize character aggression, highlighted by a 130 mm wide front tire with a gnarly, robust tread pattern. Fat Boy also sports a sporty front fender with painted brace supports, a Bobtail rear fender with chrome supports, a one-up, two-piece Dyna classic seat, a stainless steel drag-style handlebar, polished aluminum triple clamps, and a chrome, "Tommy Gun" 2-1-2 collector exhaust system with dual mufflers.

At the belly of the Dyna Fat Boy lies a powerful and new rubber-mounted 1690cc Twin Cam103 V-Twin engine with Electronic Sequential Port Fuel Injection (ESPFI). The engine is capable of delivering 92 lb/ft of torque, providing enough meat and grinds power to make other bikes of its class envious. Making it more impressive for the Dyna Fat Boy is that its engine has been mated to a six-speed Cruise Drive transmission, making that ride that much more impressive.

When Harley-Davidson designed the 2012 Dyna FXDF Fat Bob, they had one clear-cut mission in mind: to make the bike as fat and meaty as possible. Thanks to an aggressive neo-retro style and a spectacularly powerful engine, the American bike maker managed to exceed even their own lofty expectations.

Find out more about the Harley-Davidson Dyna FXDF Fat Bob after the jump.

Model Hightlights

Harley-Davidson Dyna FXDF Fat Bob
  • Black powder-coated powertrain with polished covers
  • Chrome, “Tommy Gun” 2-1-2 collector exhaust with dual mufflers
  • 5-gallon Fat Bob fuel tank
  • Silver, Slotted Disc Cast Aluminum wheels
  • Sport front fender with painted brace supports
  • Bobtail rear fender with chrome supports
  • One-piece, two-up Dyna classic seat
  • Stainless steel drag-style handlebar on black riser
  • Black fork lowers and mirrors
  • Polished aluminum triple clamps
  • High-performance, chrome-covered, coil-over rear shocks
  • Chrome low-profile tank console with electronic speedometer
  • Twin chrome headlamps

Key Features

Harley-Davidson Dyna FXDF Fat Bob
  • 6-speed Cruise Drive transmission
  • Exposed under-seat battery box
  • Forward-mounted rider footpegs with brake and shift levers
  • Optional Harley-Davidson Smart Security System with hands-free security fob


Harley-Davidson Dyna FXDF Fat Bob
EngineAir-cooled, Twin Cam 103
Displacement (in./cc)103/1690
Fuel SystemElectronic Sequential Port
Fuel Injection (ESPFI)
Transmission6-Speed Cruise Drive
Miles Per Gallon42 MPG combined City/Hwy
Length (in./mm)91.7/2329
Seat Height (laden) (in./mm)26.1/663
Wheelbase (in./mm)63.7/1618
TireDunlop Harley-Davidson Series, bias blackwall front and rear
• FrontD427F 130/90B16 67H
• RearD427 180/70B16 77H
• FrontMachined Aluminum
Slotted Disc
16 in. x 3 in.
(406 mm x 76 mm)
• RearMachined Aluminum
Slotted Disc
16 in. x 5 in.
(406 mm x 127 mm)
Fuel Capacity (U.S. gals/liters)5/18.9
Weight as Shipped (lbs./kg)673/305
FrameMild steel, tubular frame; rectangular
section backbone; stamped, cast,
and forged junctions; forged fender
supports; MIG welded
SwingarmMild steel, rectangular tube sections,
stamped junctions; MIG welded
Front Forks49 mm with polished aluminum fork
triple clamp and dual-rate springs
Rear ShocksFully Covered, Coil-over shock
Wheels:Machined Aluminum Slotted Disc
•Front16 in. x 3 in. (406 mm x 76 mm)
•Rear16 in. x 5 in. (406 mm x 127 mm)
•Caliper Type4-piston fixed front, and 2-piston
torque-free floating rear
•Rotor TypePatented, uniform expansion rotors
(floating, front only)
•Anti-lock Braking SystemAvailable
Color Options
SolidsVivid Black, Big Blue Pearl, H-D Orange, Black Denim


Ultimate Motorcycling----"When Harley-Davidson designed the 2012 FXDF Fat Bob, that had one thing in mind - just what the name implies, Fat. With an aggressive style, double chrome headlight and 130-mm front tire, the 2012 Fat Bob arrives stock with that mean, custom look. Stock items from the Motor Company include forward controls, drag-style handlebars, and an exposed under-seat battery box. Out back, the Fat Bob features chrome-covered, coil-over shocks showcase the beefy 180 mm wide rear tire."


If I were a motorcycle rider, I would also love to ride this kind of bike. With its components and style, everyone would crave for it.

I started reading an article about a "Fat Bob" only to find erroneous references to a "Fat Boy". No matter, I recently purchased one of these 2012 versions and keep it stabled next to my 2012 HD FLHRC and 1999 HD FXSTB. The "Fat Bob" provides me with a great combination of both those bikes in one sweet package. Next items are some engine tweaks and visual candy...

I can say that Harley-Davidson is really good at motorcycle manufacturing. This one looks stunning on its wheels and that suits the Dunlop tires that they have used. Anyway, I can’t seem to find its fuel capacity?

*Registration is required to post in this forum

Back to top