2018 Harley-Davidson® Fat Bob®



The all-new Fat Bob features aggressive, unapologetic styling, mind-blowing performance and handling, premium finishes, and your choice of the powerful Milwaukee-Eight® 107 or 114 Big Twin Engine.

ALSO AVAILABLE WITH THE Milwaukee-Eight® 114 ENGINE (fxfbs)


FXFB Fat Bob®

Model Code FXFB
Length (*Cert) 2,340 mm (92.1 in.)
Overall Width (*Cert) 960 mm (37.8 in.)
Overall Height (*Cert) 1,110 mm (43.7 in.)
Seat Height, Laden N/A
Seat Height, Unladen (*Cert) 710 mm (28 in.)
Ground Clearance (*Cert) 4.7 in. (120 mm)
Rake (steering head) (deg) 28
Fork Angle (deg) 28
Trail 132 mm (5.2 in.)
Wheelbase (*Cert) 1,615 mm (63.6 in.)
Tires, Type Dunlop® Harley-Davidson Series, bias blackwall front and radial blackwall rear
Tires, Front Model D429F
Tires, Front Specification 150/80-16,71H,BW
Tires, Rear Model D429
Tires, Rear Specification 180/70B16,77H,BW
Fuel Capacity 13.6 l (3.6 gal.)
Reserve Fuel Capacity, Fuel Injection (warning light) 3.8 l (1 gal.)
Oil Capacity (w/filter) 4.7 l (5 qt.)
Transmission Capacity .95 l (1 qt.)
Primary Chain Case Capacity 1.18 l (1.25 qt.)
Coolant Capacity N/A
Weight, As Shipped (*Cert) 296 kg (653 lb.)
Weight, In Running Order (*Cert) 306 kg (675 lb.)
Gross Vehicle Weight Rating (*Cert) 526 kg (1,160 lb.)
Gross Axle Weight Rating, Front (*Cert) 204 kg (450 lb.)
Gross Axle Weight Rating, Rear (*Cert) 331 kg (730 lb.)
Luggage Capacity -Volume (X.X cu ft) N/A


FXFB Fat Bob®

Engine Milwaukee-Eight® 107
Bore (*Cert) 100 mm (3.937 in.)
Stroke (*Cert) 111.1 mm (4.374 in.)
Displacement (*Cert) 1,745 cc (107 cu in)
Compression Ratio (*Cert) 10.0:1
Fuel System Electronic Sequential Port Fuel Injection (ESPFI)
Air Cleaner 8.5 in. round, radial bolt cover with washable fiberglass filter media
Exhaust 2-into-1-into-2 dual side; catalyst in muffler
Lubrication System Pressurized, dry-sump with oil cooler
Drivetrain FXFB Fat Bob®
Primary Drive (*Cert) Chain, 34/46 ratio
Final Drive (*Cert) Belt, 32/66 ratio
Clutch Mechanical, 9 plate wet
Transmission 6-Speed Cruise Drive®
Gear Ratios (overall) 1st (*Cert) 9.311
Gear Ratios (overall) 2nd (*Cert) 6.454
Gear Ratios (overall) 3rd (*Cert) 4.793
Gear Ratios (overall) 4th (*Cert) 3.882
Gear Ratios (overall) 5th (*Cert) 3.307
Gear Ratios (overall) 6th (*Cert) 2.79
Chassis FXFB Fat Bob®
Frame Mild steel, tubular frame; rectangular section backbone; stamped, cast, and forged junctions; MIG welded; aluminum forged fender supports
Swingarm Mild steel, tubular sections, stamped x-member, forged axle junctions; MIG welded; removable belt spacer
Front Fork Single cartridge 43 mm inverted with aluminum fork triple clamps; triple rate spring
Rear Shocks Hidden, free piston, coil-over monoshock; 56mm stroke; toolless hydraulic preload adjustment
Wheels, Optional Style Type N/A
Wheels, Front Type Denim black, Structure cast aluminum with laser etched graphics
Wheels, Front Width 3 in. (76 mm)
Wheels, Front Height 16 in. (406 mm)
Wheels, Rear Type Denim black, Structure cast aluminum with laser etched graphics
Wheels, Rear Width 5 in. (127 mm)
Wheels, Rear Height 16 in. (406 mm)
Brakes, Caliper Type 4-piston fixed front and 2-piston floating rear
Brakes, Rotor Type Front and rear black, Split 7-spoke floating rotors
Brakes, Front Diameter 300 mm (11.8 in.)
Brakes, Front Thickness 5.1 mm (0.2 in.)
Brakes, Front is dual Yes
Brakes, Rear Diameter 292 mm (11.5 in.)
Brakes, Rear Thickness 5.8 mm (0.23 in.)
Brakes, Anti-Lock Braking System (ABS) Standard
Suspension Travel, Front 130 mm (5.1 in.)
Suspension Travel, Rear 113 mm (4.4 in.)


FXFB Fat Bob®

Engine Torque Testing Method (*Cert) EC 134/2014
Engine Torque (*Cert) 145 Nm (107 ft-lb)
Engine Torque (rpm) (*Cert) 3,000
Lean Angle Testing Method J1168
Lean Angle, Right (deg.) 31
Lean Angle, Left (deg.) 32
Fuel Economy Testing Method EU 134/2014
Fuel Economy 5.4 l/100 km (44 mpg)
CO2 Emissions Testing Method N/A
CO2 Emissions N/A


FXFB Fat Bob®

Lights (as per country regulation), Headlamp All LED, low beam, high beam and signature position lamp
Lights (as per country regulation), Tail/Stop N/A
Lights (as per country regulation), Front Signal Lights Incandescent bullets
Lights (as per country regulation), Indicator Lamps High beam, turn signals, neutral, low oil pressure, engine diagnostics, ABS (optional), security, low battery voltage, low fuel
Lights, Rear Turn Signals N/A
Gauges 4 inch with digital speedometer, gear, odometer,fuel level and analog tachometer indication
Auxiliary Lamps N/A
Electric Power Outlet USB A-type; output 5V at 2.4A
GPS System N/A
Reverse Gear N/A
>Warranty And Service

FXFB Fat Bob®

Warranty 24 months (unlimited mileage)
Service Interval First 1,000 miles (1,600 km), every 5,000 miles (8,000 km) thereafter