Cruisers

2021Boss Hoss Sierra Trike

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The 2021 Boss Hoss Sierra Trike is an extreme custom cruiser built for thrill-seeking riders who demand raw power and unconventional style. Powered by a massive 6.2L V8 engine producing 445 horsepower and 603 Nm of torque, it's best known for delivering supercar-level performance in three-wheeled form. Its automatic transmission and shaft drive make it accessible to riders seeking maximum impact with minimal mechanical complexity.

Capacity: Not on record
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Engine: V eight, four-stroke
Gearbox: Not on record
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Dry weight: 680.4 kg
Seat height: 749 mm
Power: 445.0 HP (324.8 kW)

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How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering20%

City riding25%

Daily riding45%

Touring55%

Two-up75%

Track30%

Best for: Built as a spectacle cruiser trike, it exists to deliver outrageous straight-line V8 power and show-stopping presence rather than for sporty handling or off-road capability.
Built for: Loud, brash, and unapologetically excessive, this trike trades finesse for raw automotive-grade horsepower delivered through a shaft-driven automatic transmission.
Not ideal for: It is not for riders seeking nimble cornering, off-road ability, or a lightweight, traditional two-wheeled motorcycling experience.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 749mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2021 Boss Hoss Sierra Trike, with a cramped knee angle of around 85 degrees and a slightly forward riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 750 mm or under — Short Kings →

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Range and running costs

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Units

Currency

Fuel per litre

Riding a year

Based 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.

Full specifications

Engine

Power: 445.0 HP (324.8 kW)
CO2 Emissions: 197 CO2 g/km
Torque: 603.4 Nm (61.5 kgf-m) @ 4750 RPM
Engine type: V eight, four-stroke
Fuel consumption: 8.50 litres/100 km (11.8 km/l)
Power/weight ratio: 0.6540 HP/kg (dry)
Compression: 10.7:1
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Valves per cylinder: 4
Capacity:: Not on record - add it

Transmission

Transmission type: Automatic

Dimensions & weight

Wheelbase: 2159 mm
Overall length: 3505 mm
Overall width: 1524 mm
Seat height: 749 mm
Dry weight: 680.4 kg
Fuel capacity: 32.20 litres
Ground clearance: 152 mm
Carrying capacity: Trunc

Chassis & suspension

Front suspension: Inverted forks, 63 mm, adjustable preload
Rear suspension: Air ride
Front wheel travel: 89 mm
Rake (fork angle): 35.0°

Brakes & wheels

Front brakes: Double disc. Dual 4-piston caliper, floating disc
Front brakes diameter: 320 mm
Rear brakes: Single disc. 2-piston, floating calipers
Front tyre: 130/90-16
Rear tyre: 235/60-17

Other

Color options: Blue/Yellow
Comments: Three wheel bike. Optional 295 hp engine.

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

Rider Reviews

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MotorcycleDB

The 2021 Boss Hoss Sierra Trike motorcycle is an impressive machine that offers a perfect blend of power, performance, and style. The trike's bold and striking design is sure to turn heads wherever it goes, and its powerful engine delivers an exhilarating riding experience. With its comfortable seating and advanced suspension system, the Sierra Trike provides a smooth and enjoyable ride, making it the perfect choice for long road trips or leisurely weekend rides. Whether you're a seasoned rider or a newcomer to the world of motorcycles, the Boss Hoss Sierra Trike is sure to impress with its impressive performance and eye-catching design.

In addition to its impressive performance, the 2021 Boss Hoss Sierra Trike motorcycle also offers a range of advanced features that enhance the riding experience. The trike is equipped with cutting-edge technology and safety features, including advanced braking systems and customizable rider modes. Its spacious storage compartments also make it practical for carrying essentials on the road. Overall, the Boss Hoss Sierra Trike is a top-of-the-line motorcycle that offers a perfect combination of style, performance, and innovative features for riders looking for a thrilling and enjoyable riding experience.

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