2011 Triumph Rocket III Roadster Technical Analysis & Specification Breakdown
Positioned in Triumph's custom - cruiser motorcycle lineup, the 2011 Triumph Rocket III Roadster features a 2294 cc (140 cu in) liquid-cooled in-line three, four-stroke configuration. In factory specification, peak output is rated at 146 HP (106.6 kW) at 5,750 rpm while maximum torque reaches 221 Nm (163 lb-ft) at 2,750 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 63.6 HP per liter and a 3,000 rpm working window between peak torque (2,750 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 Roadster measures 366.1 kg (807 lbs) wet (curb), translating to a power-to-weight ratio of 0.4 HP/kg (2.51 kg per horsepower). Rider ergonomics and chassis geometry center around a 749 mm (29.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,694 mm (66.7 in) wheelbase engineered for planted straight-line stability. The 23.85-liter (6.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Triumph archive, this model family spans 10 indexed model years from 2010 to 2019, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
63.6 HP/L
Power-to-Weight
0.4 HP/kg (2.51 kg/HP)
Power Band Window
2,750–5,750 rpm
Standover Height
749 mm (29.5 in)
Engine
Displacement2294.0 ccm (139.98 cubic inches)
Engine TypeIn-line three, four-stroke
Engine DetailsIn-line three, four-stroke
Power146.0 HP (106.6 kW)) @ 5750 RPM
Torque221.0 Nm (22.5 kgf-m or 163.0 ft.lbs) @ 2750 RPM
Compression8.7:1
Bore x Stroke101.6 x 94.3 mm (4.0 x 3.7 inches)
Valves/Cylinder4
Fuel SystemInjection. Multipoint sequential electronic fuel injection with twin butterflies and progressive linkage on primary butterflies
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDigital-inductive type via engine management system
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveShaft drive (cardan) (final drive)
ClutchWet. multi-plate
Chassis
Frame TypeTubular steel. twin spine
Rake32.0°
Trail148 mm (5.8 inches)
Front SuspensionKayaba 43mm upside down forks. 120mm travel
Rear SuspensionKayaba black spring twin shocks with 5 position adjustable preload. 105mm wheel travel
Wheelbase1694 mm (66.7 inches)
Wheels & Brakes
Front Tyre150/80-R17
Rear Tyre240/50-R16
Front BrakesDouble disc
Front Brake Ø320 mm (12.6 inches)
Rear BrakesSingle disc
Rear Brake Ø316 mm (12.4 inches)
Dimensions & Weight
Weight incl.366.1 kg (807.0 pounds)
Seat Height749 mm (29.5 inches) If adjustable, lowest setting.
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.
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.
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.
