Triumph Rocket III Roadster - 2011 Specifications and Reviews

The 2011 Triumph Rocket III Roadster is a heavyweight cruiser powered by an exceptional 2294cc three-cylinder engine delivering 146 horsepower and massive 221 Nm torque for thrilling acceleration. Its character combines raw British muscle with laid-back cruiser styling, making it ideal for riders seeking commanding presence and exceptional pulling power. Best known for its unique triple-cylinder engine and commanding road presence, it offers modern fuel injection and liquid cooling for reliability.

4.5 stars Average rating: 4.5 from 4 votes
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General information

CategoryCustom / cruiser
Year2011
ModelTriumph Rocket III Roadster

Engine and Transmission Specifications

ClutchWet. multi-plate
Transmission type,final driveShaft drive (cardan)
Gearbox5-speed
Cooling systemLiquid
IgnitionDigital-inductive type via engine management system
Fuel controlDOHC
Fuel systemInjection. Multipoint sequential electronic fuel injection with twin butterflies and progressive linkage on primary butterflies
Valves per cylinder4
Bore x stroke101.6 x 94.3 mm (4.0 x 3.7 inches)
Compression8.7:1
Torque221.03 Nm (22.5 kgf-m or 163.0 ft.lbs) @ 2750
Power146.00
Engine typeIn-line three, four-stroke
Capacity:2294.00 ccm (139.98 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakes diameter316 mm (12.4 inches)
Rear brakesSingle disc
Front brakes diameter320 mm (12.6 inches)
Front brakesDouble disc
Rear tyre dimensions240/50-R16
Front tyre dimensions150/80-R17
Rear suspensionKayaba black spring twin shocks with 5 position adjustable preload. 105mm wheel travel
Front suspensionKayaba 43mm upside down forks. 120mm travel
Trail148 mm (5.8 inches)
Rake (fork angle)32.0°
Frame typeTubular steel. twin spine
 
 

Physical measures and capacities

Fuel capacity23.85 litres (6.30 gallons)
Wheelbase1,694 mm (66.7 inches)
Overall width970 mm (38.2 inches)
Overall length2,497 mm (98.3 inches)
Overall height1,163 mm (45.8 inches)
Seat height749 mm (29.5 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc366.1 kg (807.0 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsPhantom Black. Matte Black
StarterElectric

Performance Profile & Rider Fit

148 hp
Peak Power
3.4s
0-60 mph

Best For

Track25%
City45%
Cornering45%
Daily Riding65%
Touring65%
Passenger70%

Rider Profile

Best ForThis is a machine best suited to experienced riders who are confident managing enormous low-end torque and substantial weight at low speeds.
PurposeBuilt as a muscular power-cruiser, it delivers brutal straight-line acceleration and effortless overtaking rather than nimble cornering ability.
Rider FitAt 334 kg dry with a low seat height, it is manageable once rolling but demands strength and confidence during slow maneuvers, parking, and U-turns.
CharacterThe Rocket III Roadster has a dominant, torque-drenched personality that rewards relaxed, throttle-driven riding over aggressive lean-angle attacks.
Not Ideal ForThis is not the right bike for new riders, tight urban commuting, or anyone seeking a light, flickable machine for twisty backroads.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2011 Triumph Rocket III Roadster Rider Ergonomics Assessment

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Feet:

At 749mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2011 Triumph Rocket III Roadster, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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