Sportster Iron 883 Dark Custom

2018 Harley-Davidson Sportster Iron 883 Dark Custom Technical Analysis & Specification Breakdown

Built around Harley-Davidson's custom - cruiser motorcycle platform, the 2018 Harley-Davidson Sportster Iron 883 Dark Custom utilizes a 883.3 cc (53.9 cu in) air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 51 HP (37.2 kW) at 6,000 rpm while maximum torque reaches 68 Nm (50.2 lb-ft) at 4,750 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. With a specific output of 57.7 HP per liter and a 1,250 rpm working window between peak torque (4,750 rpm) and peak power (6,000 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the Sportster Iron 883 Dark Custom measures 256 kg (564 lbs) wet (curb), translating to a power-to-weight ratio of 0.2 HP/kg (5.02 kg per horsepower). Rider ergonomics and chassis geometry center around a 653 mm (25.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,515 mm (59.6 in) wheelbase engineered for balanced agility and highway composure. The 12.5-liter (3.3 US gal) fuel tank paired with a rated consumption of 4.8 L/100 km provides an estimated theoretical range of roughly 260 km (162 miles) between fill-ups.

Within MotoLibrary's Harley-Davidson archive, this model family spans 5 indexed model years from 2013 to 2018, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.