Triumph Rocket 3 GT - 2021 Specifications and Reviews
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.
General information | |
| Price as new | 3.8 See the detailed rating of design and look, maintenance cost, engine performance, etc. Compare with any other bike. |
| Category | Custom / cruiser |
| Year | 2021 |
| Model | Triumph Rocket 3 GT |
Engine and Transmission Specifications | |
| Exhaust system | Stainless steel 3-into-1 headers with 3 exit silencer |
| Emission details | Euro 5 |
| Greenhouse gases | 158.2 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Fuel consumption | 6.82 litres/100 km (14.7 km/l or 34.49 mpg) |
| Clutch | Wet, multi-plate hydraulically operated, torque assist |
| Transmission type | Shaft drive (cardan) (final drive) |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Fuel system | Injection. Ride-by-Wire |
| Bore x Stroke | 110.2 x 85.9 mm (4.3 x 3.4 inches) |
| Compression | 10.8:1 |
| Torque | 221.0 Nm (22.5 kgf-m or 163.0 ft.lbs) @ 4000 RPM |
| Power | 165.0 HP (120.4 kW) @ 6000 RPM |
| Engine details | Counter rotating crankshaft |
| Engine type | In-line three, four-stroke |
| Capacity: | 2458.0 ccm (149.99 cubic inches) |
| | |
Brakes, suspension, Frame and wheels | |
| Wheels | Cast aluminum |
| Rear brakes | Single disc. Brembo M4.32 4-piston monobloc caliper, Cornering ABS |
| Diameter | 320 mm (12.6 inches) |
| Front brakes | Double disc. Brembo M4.30 Stylema® 4-piston radial monobloc calipers, Cornering ABS |
| Rear tire | 240/50-R16 |
| Front tire | 150/80-R17 |
| Rear wheel travel | 107 mm (4.2 inches) |
| Rear Suspension | Fully adjustable Showa piggyback reservoir RSU with remote hydraulic preload adjuster. |
| Front wheel travel | 120 mm (4.7 inches) |
| Front Suspension | Showa 47mm upside-down 1 1 cartridge front forks, compression and rebound adjuster. |
| Trail | 135 mm (5.3 inches) |
| Rake (fork angle) | 27.9° |
| Frame type | Aluminium |
Physical measures and capacities | |
| Fuel capacity | 18.00 litres (4.76 US gallons) |
| Wheelbase | 1677 mm (66.0 inches) |
| Overall width | 970 mm (38.2 inches) |
| Overall length | 2500 mm (98.4 inches) |
| Overall height | 1065 mm (41.9 inches) |
| Seat height | 773 mm (30.4 inches) If adjustable, lowest setting. |
| Power/weight ratio | 0.5612 HP/kg |
| Dry weight | 294.0 kg (648.2 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Comments | Rider modes Rain/Road/Sport/Rider-configurable. |
| Factory warranty | 2 year unlimited mileage |
| Instruments | TFT multi-functional dashboard |
| Starter | Electric |
| Color options | Phantom Black, Silver Ice/Storm Grey |
Performance Profile & Rider Fit
Best For
Rider Profile
| Best For | Note: specs given are for the Rocket 3 R, not the GT variant named, though they are mechanically very similar so the profile below reflects that platform; this bike suits confident, experienced riders comfortable managing a huge, torque-heavy machine at l |
| Purpose | Built as a muscle cruiser that delivers brutal straight-line acceleration and effortless overtaking power rather than nimble cornering ability. |
| Rider Fit | Its substantial weight and long wheelbase demand solid physical strength and confidence during slow maneuvers, parking, and U-turns. |
| Character | 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. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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⚠ Safety Recalls (2)
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.
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.
Source: NHTSA. View all Triumph recalls →
Rider Reviews
MotorcycleDB Review
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.Add a Comment
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