Street Glide Special

2021 Harley-Davidson Street Glide Special Technical Analysis & Specification Breakdown

Built around Harley-Davidson's touring motorcycle platform, the 2021 Harley-Davidson Street Glide Special utilizes a 1868 cc (114 cu in) oil & air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 100 HP (73 kW) at 5,020 rpm while maximum torque reaches 160 Nm (118 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 53.5 HP per liter and a 1,770 rpm working window between peak torque (3,250 rpm) and peak power (5,020 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the Street Glide Special measures 375.1 kg (827 lbs) wet (curb), translating to a power-to-weight ratio of 0.27 HP/kg (3.75 kg per horsepower). Rider ergonomics and chassis geometry center around a 663 mm (26.1 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 22.7-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 10 indexed model years from 2014 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.