Cruisers
2021Triumph Rocket 3 GT
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The 2021 Triumph Rocket 3 GT is a heavyweight cruiser powered by an exceptional 2458cc triple-cylinder engine producing 165 horsepower and 221 Nm of torque, making it one of the most powerful cruisers available. Its unique three-cylinder character and modern technology suit riders seeking distinctive styling with genuine performance and comfort for extended touring. Known for its massive displacement, commanding presence, and the distinctive engine note of its counter-rotating crankshaft, the Rocket 3 GT delivers cruiser practicality without compromise on excitement.
- Capacity
- 2458.0 ccm
- Engine
- In-line three-cylinder, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 294.0 kg
- Seat height
- 773 mm
- Power
- 165.0 HP (120.4 kW) @ 6000 RPM
What’s new for the 2021 Triumph Rocket 3 GT
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Seat height | 750 mm (29.5 inches) | 773 mm (30.4 inches) |
| Front suspension | Showa 47 mm upside-down 1 1 cartridge front forks, compression and rebound adj. | Showa 47mm upside-down 1 1 cartridge front forks, compression and rebound adjuster. |
| Rear suspension | Fully adjustable Showa piggyback reservoir RSU with remote hydraulic preload adjuster | Fully adjustable Showa piggyback reservoir RSU with remote hydraulic preload adjuster. |
| Front brakes | Double disc. Brembo M4.30 Stylema 4-piston radial monobloc calipers. ABS. | Double disc. Brembo M4.30 Stylema® 4-piston radial monobloc calipers, Cornering ABS |
| Rear brakes | Single disc. Brembo 2-piston fixed calipers. ABS. | Single disc. Brembo M4.32 4-piston monobloc caliper, Cornering ABS |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a muscle cruiser that delivers brutal straight-line acceleration and effortless overtaking power rather than nimble cornering ability.
- Built for
- A charismatic, torque-monster cruiser with a menacing exhaust note and massive presence, prioritizing brawn and drama over agility.
- Not ideal for
- Not suited to riders wanting light, flickable handling for tight twisties or any form of off-road use.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usRange and running costs
Worked out in your browser - nothing is sent to usBased on the maker's published fuel consumption and tank size. Real-world figures depend on how and where you ride, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.
Engine
- Capacity
- 2458.0 ccm
- Power
- 165.0 HP (120.4 kW) @ 6000 RPM
- CO2 Emissions
- 174 CO2 g/km
- EPA Certificate No.
- MTDXC2.50PNX-002-R02
- EPA Est. Fuel Consumption
- 7.40 L/100km (31.8 US mpg)
- EPA CO Emissions
- 1.0 CO g/km
- Torque
- 221.0 Nm (22.5 kgf-m) @ 4000 RPM
- Engine type
- In-line three-cylinder, four-stroke
- Fuel consumption
- 6.80 litres/100 km (14.7 km/l)
- Power/weight ratio
- 0.5612 HP/kg (dry)
- Bore x stroke
- 110.2 x 85.9 mm
- Compression
- 10.8:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Aspiration
- Naturally aspirated
- Valves per cylinder
- 4
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Shaft
- Clutch
- Wet, multi-plate hydraulically operated, torque assist
Dimensions & weight
- Wheelbase
- 1677 mm
- Overall length
- 2500 mm
- Overall width
- 889 mm
- Overall height
- 1065 mm
- Seat height
- 773 mm
- Dry weight
- 294.0 kg
- Fuel capacity
- 18.00 litres
Chassis & suspension
- Frame
- Aluminium
- Front suspension
- Showa 47mm upside-down 1 1 cartridge front forks, compression and rebound adjuster.
- Rear suspension
- Fully adjustable Showa piggyback reservoir RSU with remote hydraulic preload adjuster.
- Front wheel travel
- 120 mm
- Rear wheel travel
- 107 mm
- Rake (fork angle)
- 27.9°
- Trail
- 135 mm
Brakes & wheels
- Front brakes
- Double disc. Brembo M4.30 Stylema® 4-piston radial monobloc calipers, Cornering ABS
- Front brakes diameter
- 320 mm
- Rear brakes
- Single disc. Brembo M4.32 4-piston monobloc caliper, Cornering ABS
- ABS
- Yes
- Front tyre
- 150/80-R17
- Rear tyre
- 240/50-R16
Other
- Color options
- Phantom Black, Silver Ice/Storm Grey
- Warranty
- 24
- Comments
- Rider modes Rain/Road/Sport/Rider-configurable.
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|
| Capacity | 2458 cc | 2458 cc | 2458 cc | 2458 cc | 2458 cc |
| Dry weight | 294 kg | 294 kg | 294 kg | 294 kg | 294 kg |
| Seat height | 750 mm | 773 mm | 750 mm | 750 mm | 750 mm |
| Fuel capacity | 18 L | 18 L | 18 L | 18 L | 18 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Safety Recalls
⚠ 2 recalls may applySERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDEROct 2023 · 23V730000
Triumph Motorcycles America, Ltd. (Triumph) is recalling certain 2020 Rocket 3 TFC, 2020-2024 Rocket 3 R, Rocket 3 GT, 2022 Rocket 3 GT Triple Black, and Rocket 3 R Black motorcycles. The rear brake master cylinder may fail to move fluid through the system properly, requiring an extended distance to stop.
Risk: Extended stopping distance increases the risk of a crash.
Remedy: Dealers will replace the rear brake master cylinder, free of charge. Owner notification letters were mailed November 20, 2023. Owners may contact Triumph's customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 611.
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:HYDRAULIC:HOSES, LINES/PIPING, AND FITTINGSNov 2020 · 20V740000
Triumph Motorcycles America, LTD (Triumph) is recalling certain 2020-2021 Rocket 3 GT, Rocket 3 R, and 2020 Rocket 3 TFC motorcycles. Air could have entered the antilock brake system (ABS) modulator while the rear brake system was filled during production.
Risk: Over time, the air in the ABS modulator can deteriorate rear braking efficiency, increasing the distance required to stop and the risk of a crash.
Remedy: Triumph will notify owners, and dealers will bleed the rear brake system, free of charge. The recall began December 18, 2020. Owners may contact Triumph customer service at 1-678-854-2010. Triumph's number for this recall is SRAN 587.
These recalls cover some 2021 bikes of this model. Whether one applies to a specific bike, and whether the repair has already been done, depends on its VIN — check your VIN with NHTSA or ask a dealer.
Source: NHTSA. View all Triumph recalls →
Rider Reviews
Common questions
What is the engine size of the Triumph Rocket 3 GT?
The 2021 Triumph Rocket 3 GT has a Capacity of 2458.0 ccm (150.00 cubic inches).
What engine power does the Triumph Rocket 3 GT have?
The 2021 Triumph Rocket 3 GT has a Power of 165.0 HP (120.4 kW) @ 6000 RPM.
How many gears does the Triumph Rocket 3 GT have?
The 2021 Triumph Rocket 3 GT has a Gearbox of 6-speed.
What is the torque of the Triumph Rocket 3 GT?
The 2021 Triumph Rocket 3 GT has a Torque of 221.0 Nm (22.5 kgf-m or 163.0 ft.lbs) @ 4000 RPM.
How much does the Triumph Rocket 3 GT weigh?
The 2021 Triumph Rocket 3 GT has a Dry weight of 294.0 kg (648.2 pounds).
Shop this bike
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The 2021 Triumph Rocket 3 GT is a powerful and stylish motorcycle that delivers an exhilarating riding experience. With its mammoth 2,500cc engine, the Rocket 3 GT offers incredible acceleration and a commanding presence on the road. Its sleek design, comfortable ergonomics, and advanced technology make it a top choice for riders looking for a premium touring bike with unrivaled performance.
The Rocket 3 GT's massive torque and smooth handling make it a standout in the cruiser motorcycle category. Its premium features, including multiple riding modes, cornering ABS, and traction control, ensure a safe and enjoyable ride in various road conditions. Whether cruising on the open highway or navigating tight corners, the Triumph Rocket 3 GT delivers an unforgettable ride that will impress even the most discerning motorcycle enthusiasts.
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