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Overview

2026 Harley-Davidson Fat Boy

Motorcycle

Built in the Image of Bold

Wide 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.

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Specs & Features

Dimensions
Length
2,365 mm
Width
965 mm
Seat Height, Unladen
675 mm
Ground Clearance
125 mm
Rake
30
Trail
104 mm
Wheelbase
1,650 mm
Tire, Type
Michelin™ Scorcher 11, front and rear
Tires, Front Specification
160/60R18,70V,BW
Tires, Rear Specification
240/40R18,79V,BW
Fuel Capacity
18.9 l
Oil Capacity (w/filter)
4.7 l
Weight, In Running Order
315 kg
Engine
Engine
Milwaukee-Eight™ 117 Custom
Bore
103.5 mm
Stroke
114.3 mm
Displacement
1,923 cc
Compression Ratio
10.3:1
Fuel System+
Electronic Sequential Port Fuel Injection (ESPFI)
Exhaust
2-into-2 staggered; catalyst in muffler
Performance
Engine Torque Testing Method
EC 134/2014
Engine Torque+
168 Nm
Engine Torque (rpm)
3000
Horsepower
103 HP / 77 kW @ 5020 rpm
Lean Angle, Left (deg.)
25.6
Fuel Economy Testing Method
EU 134/2014
Fuel Economy+
5.5 l/100 km
CO2 Emissions Testing Method
EU 134/2014
CO2 Emissions
128 g/km CO2
Lean Angle, Right (deg.)
25.6
Drive Train
Primary Drive
Chain, 34/46 ratio
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
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
Wheels, Front Type+
Machined, Lakester cast aluminum
Wheels, Rear Type+
Machined, Lakester cast aluminum
Brakes, Caliper Type
4-piston fixed front and 2-piston floating rear
Brakes, Rotor Type
Front and rear silver, Split 7-spoke floating rotors
Electric
Lights (as per country regulation), Headlamp, Tail/Stop, Front Signal Lights, Rear Turn Signals
Headlamp: All LED headlamp, low and high beam with signature position lighting; Tail/Stop: Bullet-style, LED stop/tail/turn signals; Front Signal Lights/Rear Turn Signals: LED Bullet Turn Signals
Gauges
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
Punchy Milwaukee-Eight 117 Custom Motor
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.
Airflow-Optimized Touring Intake
Designed to move more air through the Milwaukee-Eight 117, the Touring Intake helps maintain steady power and smooth throttle response mile after mile.
Classic Machined Lakester Wheels
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.
Ride-Ready Hand Control
With a thumb’s flick, you’ve got more command than ever. Switch between Road, Rain, and Sport modes on the fly, set cruise control when the highway stretches out, and trust built-in Rider Safety Enhancements — Cornering ABS, Traction Control, Drag-Torque Slip Control, and TPMS — to hold the line so you can focus on what’s in front of you.
Signature Headlamp Nacelle + LED Lighting All Around
A sculpted chrome nacelle frames the front end of the Fat Boy, lit by a powerful 178 mm 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.

©2026. Harley Davidson Dev. All Rights Reserved.

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