Rocket III

2005 Triumph Rocket III Technical Analysis & Specification Breakdown

Built around Triumph's custom - cruiser motorcycle platform, the 2005 Triumph Rocket III utilizes a 2294 cc (140 cu in) liquid-cooled in-line three, four-stroke layout. In factory specification, peak output is rated at 142 HP (103.6 kW) at 5,750 rpm while maximum torque reaches 200 Nm (147.5 lb-ft) at 2,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 61.9 HP per liter and a 3,250 rpm working window between peak torque (2,500 rpm) and peak power (5,750 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the Rocket III measures 320 kg (705 lbs) dry, translating to a power-to-weight ratio of 0.44 HP/kg (2.25 kg per horsepower). Rider ergonomics and chassis geometry center around a 740 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,695 mm (66.7 in) wheelbase engineered for planted straight-line stability.

Within MotoLibrary's Triumph archive, this model family spans 6 indexed model years from 2004 to 2009, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.