Engineered by Harley-Davidson for the touring motorcycle segment, the 2018 Harley-Davidson Road Glide Ultra utilizes a 1753.5 cc (107 cu in) oil & air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 90 HP (65.7 kW) at 5,450 rpm while maximum torque reaches 153 Nm (112.9 lb-ft) at 3,250 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 51.3 HP per liter and a 2,200 rpm working window between peak torque (3,250 rpm) and peak power (5,450 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Road Glide Ultra measures 425 kg (937 lbs) wet (curb), translating to a power-to-weight ratio of 0.21 HP/kg (4.72 kg per horsepower). Rider ergonomics and chassis geometry center around a 735 mm (28.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,625 mm (64 in) wheelbase engineered for planted straight-line stability. The 18.9-liter (5 US gal) fuel tank paired with a rated consumption of 6.1 L/100 km provides an estimated theoretical range of roughly 310 km (193 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 5 indexed model years from 2013 to 2019, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
51.3 HP/L
Power-to-Weight
0.21 HP/kg (4.72 kg/HP)
Power Band Window
3,250–5,450 rpm
Theoretical Range
~310 km (193 mi)
Engine
Displacement1753.5 ccm (107.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsTwin-Cooled™ Milwaukee-Eight® 107
Power90.0 HP (65.7 kW)) @ 5450 RPM
Torque153.0 Nm (15.6 kgf-m or 112.9 ft.lbs) @ 3250 RPM
Compression10.0:1
Bore x Stroke100.0 x 111.3 mm (3.9 x 4.4 inches)
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
LubricationDry sump
CoolingOil & air
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
DrivelineChain, 34/46 ratio primary drive
Performance
Fuel Consumption6.10 litres/100 km (16.4 km/l or 38.56 mpg)
Greenhouse Gases141.5 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome dual exhaust with 4 in. touring mufflers and touring muffler shields
Chassis
Rake26.0°
Trail170 mm (6.7 inches)
Front SuspensionTelescopic fork
Rear SuspensionTwin shocks
Wheelbase1625 mm (64.0 inches)
Ground Clearance130 mm (5.1 inches)
Wheels & Brakes
Front Tyre130/80-B17
Rear Tyre180/65-B16
Front BrakesDouble disc. ABS. 4-piston
Rear BrakesSingle disc. ABS. 4-piston
WheelsImpeller Cast Aluminum
Dimensions & Weight
Dry Weight408.0 kg (899.5 pounds)
Weight incl.425.0 kg (937.0 pounds)
Power/Weight0.2206 HP/kg
Seat Height735 mm (28.9 inches) If adjustable, lowest setting.
Overall Length2595 mm (102.2 inches)
Fuel Capacity18.90 litres (4.99 US gallons)
Oil Capacity4.90 litres (5.18 US quarts)
Other
StarterElectric
Color OptionsVivid Black, Wicked Red/Twisted Cherry, Industrial Gray, Electric Blue, Legend Blue Denim, Silver Fortune/Black Tempest, Silver Fortune/Sumatra Brown
InstrumentsFairing-mounted electronic speedometer with odometer; time-of-day clock on CD player/stereo; dual trip meter; low fuel indicator light and mileage countdown feature; low oil pressure indicator light; engine diagnostics readout; LED indicator lights; 6-speed indicator light Tachometer with fuel, voltage, oil pressure and ambient air temperature gauges
LightHigh beam, running lights, front fender light, directional light bar, neutral, low oil pressure, engine diagnostics, turn signals, security system (optional), 6-speed, low fuel warning, cruise control (optional), ABS (optional)
Carrying CapacitySaddle bags. Top Box.
Notes
Small windshield. Cruise control. Alarm. Infotainment. USB. Bluetooth.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
