2026 Harley-Davidson® Fat Boy® Base
Exterior Colors:
- Year 2026
- Make Harley-Davidson®
- Model Fat Boy®
- Engine Milwaukee-Eight® 117 Custom
2026 Harley-Davidson® Fat Boy® Base
2026 Harley-Davidson® Fat Boy®
Built in the Image of BoldWide tires front and back. Classic Lakester cast aluminum wheels. The iconic steamroller stance, backed by a Milwaukee-Eight® 117 motor. LED lighting all around, Rider Safety Enhancements standard, and fine factory details that honor one of Harley-Davidson's most legendary silhouettes. The 2026 Fat Boy is bold by design.
Features may include:
Nothing Looks Like a Fat Boy- From its signature steamroller stance to new paint, a unique tank medallion, and full LED lighting, the 2026 Fat Boy defines one of Harley-Davidson’s most stand-out bikes.
- The 2026 Fat Boy gets a fresh shot of attitude with a Fat Boy-specific tank medallion and bold new Olive Steel Metallic two-tone, joining Dark Billiard Gray, Vivid Black, White Onyx Pearl, and Brilliant Red. It’s a lineup built to make an entrance, no matter which shade you choose.
- Solid Lakester cast aluminum wheels, paired with wide front and rear tires, give the Fat Boy its unmistakable steamroller stance and planted look from every angle
- A sculpted chrome nacelle frames the front end of the Fat Boy, lit by a powerful 7" LED headlamp. Bright LED signals complete the bike’s all-around LED lighting package, blending timeless style with modern visibility. It’s a classic face, sharpened through a modern lens.
- The Milwaukee-Eight 117, Touring Intake, 2-into-2 exhaust, and performance-tuned suspension make the 2026 Fat Boy a show of force to match its legendary presence.
- The Milwaukee-Eight 117 feeds the Fat Boy exactly what it was built for: big torque and roll-on power that turns its solid, planted stance into something that moves with surprising quickness.
Engine
Engine
Milwaukee-Eight® 117 Custom
Valve train
Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; four valves per cylinder
Bore
103.5 mm (4.075 in.)
Stroke
114.3 mm (4.5 in.)
Displacement
1,923 cc (117 cu in)
Compression Ratio
10.3:1
Fuel System
Electronic Sequential Port Fuel Injection (ESPFI)
Air Cleaner
Helix style A/C
Exhaust
2-into-2 staggered; catalyst in muffler
Lubrication
Pressurized, dry-sump with oil cooler
Dimensions
Length
2,365 mm (93.1 in.)
Overall Width
965 mm (40 in.)
Overall Height
1,120 mm (44.1 in.)
Seat Height, Unladen
675 mm (26.6 in.)
Ground Clearance
Static: 125 mm (4.9 in.)
Rake (steering head) (deg)
30 deg
Fork
Angle: 32 deg
Trail
104 mm (4.1 in.)
Wheelbase
1,650 mm (65 in.)
Front Tire
Michelin® Scorcher 11,
Rear Tire
Michelin® Scorcher 11,
Front Tires / Model
Scorcher 11
Tires, Front Specification
160/60R18,70V,BW
Rear Tires / Model
Scorcher 11
Tires, Rear Specification
240/40R18,79V,BW
Fuel Capacity
18.9 l (5 gal.)
Fuel Reserve
3.8 l (1 gal.)
Oil Capacity (w/filter)
4.7 l (5 qt.)
Oil capacity
Transmission: .95 l (1 qt.) | Primary Chain Case: 1.35 l (1.43 qt.)
Weight, As Shipped
303 kg (668 lb.)
Weight, In Running Order
315 kg (694 lb.)
GVWR
533 kg (1,175 lb.)
Gross Axle Weight Rating, Front
204 kg (450 lb.)
Gross Axle Weight Rating, Rear
345 kg (760 lb.)
Performance
Engine Torque Testing Method
J1349
Engine Torque
171 Nm (126 ft-lb)
Engine Torque (rpm)
3,000 rpm
Engine Power
103 HP / 77 kW @ 4800 rpm
Lean Angle, Right (deg.)
Testing Method: J1168 | 25.6 deg
Lean Angle, Left (deg.)
Testing Method: J1168 | 25.6 deg
Fuel Economy: Combined City/Hwy
Testing Method: EU 134/2014 | 5.5 l/100 km (43 mpg)
Emissions
CO2 Testing Method: EU 134/2014 | CO2: 128 g/km CO2
Drivetrain
Primary Drive
Chain, 34/46 ratio
Final Drive
Belt, 32/66 ratio
Clutch
Mechanical, 10 plate wet, assist & conventional
Transmission
6-Speed Cruise Drive®
Gear Ratios (overall) 1st
9.311
Gear Ratios (overall) 2nd
6.454
Gear Ratios (overall) 3rd
4.793
Gear Ratios (overall) 4th
3.882
Gear Ratios (overall) 5th
3.307
Gear Ratios (overall) 6th
2.79
Chassis
Frame Type
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
Dual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring; "beer can" covers
Rear Shocks
Hidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Wheel Type, Front
Machined, Lakester cast aluminum
Front Wheel
Diameter: 18 in. (457 mm) | Width: 4.5 in. (114 mm)
Wheels Type, Rear
Machined, Lakester cast aluminum
Rear Wheel
Diameter: 18 in. (457 mm) | Width: 8 in. (203 mm)
Brakes, Caliper Type
4-piston fixed front and 2-piston floating rear
Brake System Type
Rotor: Front and rear silver, Split 7-spoke floating rotors
Brake Disc Diameter, Front
300 mm (11.8 in.)
Front braking system
Thickness: 5 mm (0.2 in.)
Brake Disc Diameter, Rear
292 mm (11.5 in.)
Rear braking system
Thickness: 5.8 mm (0.23 in.)
ABS Option
Standard
Front Travel (in./cm.)
130 mm (5.1 in.)
Rear Travel (in./cm.)
86 mm (3.4 in.)
Electric
Battery
Sealed, maintenance-free, absorbed glass mat (AGM) battery, 12V, 17.5Ah, 310 CCA at 0°F
Battery Charger Type
Three-phase, 48 Amp system (364 Watts @13 Volts, 900 rpm, 624 Watts max power @ 13 Volts, 2000 rpm)
Starter
1.6 kW electric with solenoid shift starter motor engagement
Lighting
Headlamp: All LED headlamp, low and high beam with signature position lighting | Tail/Stop: Bullet-style, LED stop/tail/turn signals | Front Signal Lights: LED Bullet Turn Signals | Rear Turn Signals: LED Bullet Turn Signals
Gauges
5-inch (127 mm) analog speedometer with digital gear, odometer, fuel level, ride modes, heated gear, traction control, ABS, TPMS, cruise control, clock, trip, range and tachometer indication
Features
Features
Electric Power Outlet: USB C-Type , Output 5V at 2.4 Amp