Engineered by Harley-Davidson for the touring motorcycle segment, the 2021 Harley-Davidson Road Glide features a 1746 cc (106.5 cu in) air-cooled v2, four-stroke configuration. In factory specification, peak output is rated at 89 HP (65 kW) at 5,450 rpm while maximum torque reaches 150.5 Nm (111 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 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 measures 388 kg (855 lbs) wet (curb), translating to a power-to-weight ratio of 0.23 HP/kg (4.36 kg per horsepower). Rider ergonomics and chassis geometry center around a 658 mm (25.9 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 22.71-liter (6 US gal) fuel tank paired with a rated consumption of 5.23 L/100 km provides an estimated theoretical range of roughly 434 km (270 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 15 indexed model years from 1998 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
51 HP/L
Power-to-Weight
0.23 HP/kg (4.36 kg/HP)
Power Band Window
3,250–5,450 rpm
Theoretical Range
~434 km (270 mi)
Engine
Displacement1746.0 ccm (106.54 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsMilwaukee-Eight™ 107
Power89.0 HP (65.0 kW)) @ 5450 RPM
Torque150.5 Nm (15.3 kgf-m or 111.0 ft.lbs) @ 3250 RPM
Compression10.0:1
Bore x Stroke100.0 x 111.1 mm (3.9 x 4.4 inches)
Fuel SystemInjection. ESPFI
LubricationDry sump
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
DrivelineChain, 34/46 ratio primary drive
Performance
Fuel Consumption5.23 litres/100 km (19.1 km/l or 44.98 mpg)
Greenhouse Gases121.3 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome, 2-1-2 dual exhaust with tapered mufflers
Chassis
Rake26.0°
Trail173 mm (6.8 inches)
Front SuspensionTelescopic fork
Rear SuspensionTwin shocks
Wheelbase1625 mm (64.0 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre130/70-B19
Rear Tyre180/55-B18
Front BrakesDouble disc. ABS. 4-piston
Rear BrakesSingle disc. ABS. 4-piston
WheelsEnforcer II Cast Aluminum
Dimensions & Weight
Dry Weight372.0 kg (820.1 pounds)
Weight incl.388.0 kg (855.4 pounds)
Power/Weight0.2392 HP/kg
Seat Height658 mm (25.9 inches) If adjustable, lowest setting.
Overall Length2431 mm (95.7 inches)
Fuel Capacity22.71 litres (6.00 US gallons)
Oil Capacity4.90 litres (5.18 US quarts)
Other
StarterElectric
Color OptionsVivid Black, Gauntlet Gry Metallic, Billiard Red
InstrumentsDisplay features odometer, trip A, trip B, range to empty and gear indicator; and larger tell-tale indicators.
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 CapacityHard saddle bags
Notes
Small windshield. Cruise control. Infotainment. USB.
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.
