Cruisers
2021Triumph Rocket 3 GT Triple Black
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The 2021 Triumph Rocket 3 GT Triple Black is a cruiser engineered for riders seeking massive torque and presence rather than agility. Its 2458cc triple engine delivers commanding 221 Nm of torque, making it ideal for highway cruising and low-end grunt. Known for its distinctive character and imposing stance, this bike rewards straightforward riding over technical handling.
- Capacity
- 2458.0 ccm
- Engine
- In-line three-cylinder, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 294.0 kg
- Seat height
- 750 mm
- Power
- 165.0 HP (120.4 kW) @ 6000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for effortless, brutal straight-line acceleration and long-haul cruising with a menacing power-cruiser presence.
- Built for
- For someone who wants the biggest engine in production motorcycling wrapped in a comfortable, muscular cruiser silhouette.
- Not ideal for
- Not for beginners, off-road enthusiasts, or anyone prioritizing light, flickable handling in tight corners.
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. Official figures come from a gentle lab test - most riders use 10-30% more fuel than this, so expect less range in real riding, and the last litres of a tank are reserve. Prices shown greyed are examples - type your own.
Reliability & safety
Bike Reliability score, safety recalls and owner complaintsSafety 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, use gov.uk/check-vehicle-recall in the UK, or ask a dealer.
Source: NHTSA. View all Triumph recalls →
Bike Reliability
How the score works →90
out of 100Excellent
The 2021 Triumph Rocket 3 GT Triple Black passed its annual roadworthiness test first time 92.7% of the time, 8.9 points above expected for bikes of the same age and mileage. That beats 90% of models.
All years of this model: 91 / 100 (excellent) from 222 tests.
92.7%Passed first time
3.2%Failed outright
4.1%Fixed during test
6,000Typical miles
220Tests
Pass rate by miles ridden
All years of this model.
Against its rivals · ranks 3 of 6
| # | Model (all years) | Score | Tests |
|---|---|---|---|
| 1 | Indian Chief | 95 Excellent | 826 |
| 2 | Indian Chief Dark Horse | 93 Excellent | 282 |
| 3 | Triumph Rocket 3 GT Triple Black | 91 Excellent | 222 |
| 4 | Triumph Bonneville Speedmaster | 84 Excellent | 718 |
| 5 | Harley-Davidson Fat Boy 114 | 78 Good | 1,439 |
| 6 | Indian Scout Bobber | 76 Good | 1,937 |
Rivals are the most-viewed bikes on MotorcycleDB in the same category and engine size, from within three years of this model.
From British annual roadworthiness tests, 2005-2025. Contains public sector information licensed under the Open Government Licence v3.0 (DVSA MOT test data, Great Britain). How Bike Reliability works.
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
- 2365 mm
- Overall width
- 886 mm
- Overall height
- 1066 mm
- Seat height
- 750 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
- Rear brakes diameter
- 300 mm
- ABS
- Yes
- Front tyre
- 150/80-R17
- Rear tyre
- 240/50-R16
Maintenance
- Tyre pressure (solo)
- Front 290 kPa (42 psi), rear 290 kPa (42 psi)
- Oil capacity
- 5.20 litres
- Oil change
- 4.40 litres
- Oil change with filter
- 4.60 litres
- Fuel grade
- Unleaded, 87 PON (AKI) or higher (95 RON minimum)
- Battery
- YTX20CH-BS, 12 V 18.9 Ah
- Spark plug
- NGK LMAR8A-9
- Coolant
- Triumph HD4X Hybrid OAT, premixed 50/50
- Coolant capacity
- 2.60 litres
- Brake fluid
- DOT 4
Other
- Color options
- Sapphire Black Silver Ice
- Warranty
- 24
- Comments
- Limited edition
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Triumph Rocket 3 GT Triple Black?
The 2021 Triumph Rocket 3 GT Triple Black has a Capacity of 2458.0 ccm (150.00 cubic inches).
What engine power does the Triumph Rocket 3 GT Triple Black have?
The 2021 Triumph Rocket 3 GT Triple Black has a Power of 165.0 HP (120.4 kW) @ 6000 RPM.
How many gears does the Triumph Rocket 3 GT Triple Black have?
The 2021 Triumph Rocket 3 GT Triple Black has a Gearbox of 6-speed.
What is the torque of the Triumph Rocket 3 GT Triple Black?
The 2021 Triumph Rocket 3 GT Triple Black 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 Triple Black weigh?
The 2021 Triumph Rocket 3 GT Triple Black has a Dry weight of 294.0 kg (648.2 pounds).
Shop this bike
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The 2021 Triumph Rocket 3 GT Triple Black is an impressive motorcycle that combines power, style, and performance. With its massive 2,500cc engine, this bike delivers an exhilarating riding experience that is perfect for taking long trips or cruising around town. The sleek black design adds a touch of sophistication to the bike, while the comfortable seating and ergonomic controls make it easy to ride for extended periods of time. Whether you're a seasoned rider or a beginner, the Triumph Rocket 3 GT Triple Black is sure to impress with its smooth handling and impressive acceleration.
The 2021 Triumph Rocket 3 GT Triple Black is a stunning motorcycle that offers an unbeatable combination of power, style, and performance. With its massive 2,500cc engine, this bike delivers an exhilarating riding experience that is perfect for long trips or casual rides. The sleek black design adds a touch of sophistication to the bike, while the comfortable seating and ergonomic controls make it easy to ride for extended periods. Whether you're a seasoned rider or a beginner, the Triumph Rocket 3 GT Triple Black is sure to impress with its smooth handling and impressive acceleration.
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