Naked Motorcycles
2021Triumph Street Twin
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The 2021 Triumph Street Twin is an approachable modern classic that suits newer riders and anyone wanting relaxed, stylish everyday riding. Its 900 cc parallel twin makes 64 hp and a strong 80 Nm at just 3800 rpm, so town work and back roads feel easy rather than demanding. It's best known for its low 765 mm seat, timeless Bonneville looks and friendly, torque-rich character.
- Capacity
- 900.0 ccm
- Engine
- Parallel Twin, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 198.0 kg
- Seat height
- 765 mm
- Power
- 64.1 HP (46.0 kW) @ 7500 RPM
What’s new for the 2021 Triumph Street Twin
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Power | 61.7 HP (46.0 kW) @ 6900 RPM | 64.1 HP (46.0 kW) @ 7500 RPM |
| Front suspension | KYB twin RSUs, with adjustable preload | 41mm cartridge forks |
| Rear suspension | KYB twin shocks with adjustable preload. | Twin RSUs with preload adjustment |
| Front brakes | Single disc. ABS. Floating discs. Nissin two-piston calipers. | Single disc. ABS. Floating discs. Brembo 4-piston calipers. |
| Rear brakes | Single disc. ABS. Floating disc. Nissin two-piston calipers. | Single disc. ABS. Floating disc. Nissin 2-piston calipers. |
| Wheelbase | 1415 mm (55.7 inches) | 1450 mm (57.1 inches) |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built primarily as a stylish, easygoing modern classic for commuting and weekend rides rather than outright performance or long-distance touring.
- Built for
- A torquey, characterful parallel-twin roadster that prioritizes smooth, tractable real-world power and classic British styling over outright speed.
- Not ideal for
- Not the right choice for riders chasing high-speed thrills, serious off-road capability, or a dedicated long-haul touring setup with passenger comfort and wind protection.
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
- 900.0 ccm
- Power
- 64.1 HP (46.0 kW) @ 7500 RPM
- CO2 Emissions
- 94 CO2 g/km
- EPA Certificate No.
- MTDXC.900VVN-007-R01
- EPA Est. Fuel Consumption
- 4.01 L/100km (58.7 US mpg)
- EPA CO Emissions
- 1.0 CO g/km
- Torque
- 80.0 Nm (8.2 kgf-m) @ 3800 RPM
- Engine type
- Parallel Twin, four-stroke
- Fuel consumption
- 3.90 litres/100 km (25.6 km/l)
- Power/weight ratio
- 0.3237 HP/kg (dry)
- Bore x stroke
- 84.6 x 80.0 mm
- Compression
- 11.0:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Aspiration
- Naturally aspirated
- Valves per cylinder
- 4
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet. multi-plate assist
Dimensions & weight
- Wheelbase
- 1450 mm
- Overall width
- 785 mm
- Overall height
- 1110 mm
- Seat height
- 765 mm
- Dry weight
- 198.0 kg
- Wet weight
- 215.9 kg
- Fuel capacity
- 12.10 litres
- Oil capacity
- 3.80 litres
Chassis & suspension
- Frame
- Tubular steel, with twin cradles
- Front suspension
- 41mm cartridge forks
- Rear suspension
- Twin RSUs with preload adjustment
- Front wheel travel
- 120 mm
- Rear wheel travel
- 120 mm
- Rake (fork angle)
- 25.1°
- Trail
- 102 mm
Brakes & wheels
- Front brakes
- Single disc. ABS. Floating discs. Brembo 4-piston calipers.
- Front brakes diameter
- 310 mm
- Rear brakes
- Single disc. ABS. Floating disc. Nissin 2-piston calipers.
- Rear brakes diameter
- 255 mm
- ABS
- Yes
- Front tyre
- 100/90-18
- Rear tyre
- 150/70-R17
Other
- Color options
- Cobalt Blue, Jet Black, Matt Ironstone
- Comments
- Ride-by-wire throttle with switchable traction control. 2 riding modes, road and rain.
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 | 2016 | 2018 | 2019 | 2021 | 2022 |
|---|---|---|---|---|---|
| Capacity | 900 cc | 900 cc | 900 cc | 900 cc | 900 cc |
| Dry weight | 198 kg | 198 kg | 198 kg | 198 kg | 198 kg |
| Seat height | 749 mm | 750 mm | 759 mm | 765 mm | 765 mm |
| Fuel capacity | 12.1 L | 12.1 L | 12.1 L | 12.1 L | 12.1 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Triumph Street Twin?
The 2021 Triumph Street Twin has a Capacity of 900.0 ccm (54.92 cubic inches).
What engine power does the Triumph Street Twin have?
The 2021 Triumph Street Twin has a Power of 64.1 HP (46.0 kW) @ 7500 RPM.
How many gears does the Triumph Street Twin have?
The 2021 Triumph Street Twin has a Gearbox of 5-speed.
What is the torque of the Triumph Street Twin?
The 2021 Triumph Street Twin has a Torque of 80.0 Nm (8.2 kgf-m or 59.0 ft.lbs) @ 3800 RPM.
How much does the Triumph Street Twin weigh?
The 2021 Triumph Street Twin has a Dry weight of 198.0 kg (436.5 pounds).
Shop this bike
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The 2021 Triumph Street Twin motorcycle is a versatile and stylish option for riders looking for a modern classic bike. With its 900cc parallel-twin engine, the Street Twin offers plenty of power and torque for an exhilarating ride. The updated chassis and suspension provide agile handling, making it a joy to maneuver through city streets or twisty backroads. The classic styling, combined with modern features such as ride-by-wire throttle and multiple riding modes, make the Street Twin a great option for riders who want a blend of vintage aesthetics and contemporary performance.
Overall, the 2021 Triumph Street Twin motorcycle is a fantastic choice for riders looking for a well-rounded modern classic bike. Its combination of classic styling, modern features, and powerful performance make it a standout option in its class. Whether you're a seasoned rider or a beginner, the Street Twin's versatility and agility make it a great choice for any rider looking for a stylish and capable motorcycle.
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