2021 Harley-Davidson Softail Standard Technical Analysis & Specification Breakdown
Positioned in Harley-Davidson's custom - cruiser motorcycle lineup, the 2021 Harley-Davidson Softail Standard pairs a 1753.5 cc (107 cu in) air-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, maximum torque reaches 149.2 Nm (110 lb-ft) at 3,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 100.0 x 111.1 mm (3.9 x 4.4 inches) with a 10.0:1 compression ratio.
On the scales, the Softail Standard measures 297.1 kg (655 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 655 mm (25.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,631 mm (64.2 in) wheelbase engineered for planted straight-line stability. The 13.25-liter (3.5 US gal) fuel tank paired with a rated consumption of 4.7 L/100 km provides an estimated theoretical range of roughly 282 km (175 miles) between fill-ups, while factory top speed is listed at 170 km/h (106 mph).
Within MotoLibrary's Harley-Davidson archive, this model family spans 6 indexed model years from 1999 to 2024, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~282 km (175 mi)
Engine
Displacement1753.5 ccm (107.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsMilwaukee-Eight® 107
Torque149.2 Nm (15.2 kgf-m or 110.0 ft.lbs) @ 3000 RPM
Compression10.0:1
Bore x Stroke100.0 x 111.1 mm (3.9 x 4.4 inches)
Fuel SystemInjection. Electronic Sequential Port Fuel Injection
CoolingAir
Transmission
Gearbox5-speed
Final DriveBelt (final drive)
DrivelineChain, 34/46 ratio primary
Performance
Top Speed170.0 km/h (105.6 mph)
Fuel Consumption4.70 litres/100 km (21.3 km/l or 50.05 mpg)
Greenhouse Gases109.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Exhaust2-into-2 shotgun; catalyst in muffler
Chassis
Rake30.0°
Trail157 mm (6.2 inches)
Front Travel142 mm (5.6 inches)
Rear Travel103 mm (4.1 inches)
Wheelbase1631 mm (64.2 inches)
Ground Clearance124 mm (4.9 inches)
Wheels & Brakes
Front Tyre100/90-B19
Rear Tyre150/80-B16
Front BrakesSingle disc. 4-piston fixed. Optional ABS.
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
