2009 Triumph Rocket III Technical Analysis & Specification Breakdown
Built around Triumph's custom - cruiser motorcycle platform, the 2009 Triumph Rocket III relies on a 2294 cc (140 cu in) liquid-cooled in-line three, four-stroke powerplant. In factory specification, peak output is rated at 139.5 HP (101.8 kW) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 60.8 HP per liter, 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 (2.29 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. The 24-liter (6.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
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.
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.
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.
