2025Triumph Speed 400

Rate this bike

37 fields on record

The 2025 Triumph Speed 400 is a retro roadster for newer riders and A2 licence holders. Its 398cc single makes 39.4 hp and 37.5 Nm through a six-speed gearbox. A 790 mm seat, 170 kg wet weight, ABS and a 300 mm front disc with a four-piston radial caliper make it easy to ride and well equipped for its price class.

Capacity: 398.0 ccm
Engine: Single, four-stroke
Gearbox: 6-speed
Wet weight: 170.0 kg
Seat height: 790 mm
Power: 39.4 HP (29.4 kW) @ 8000 RPM

⇄ Compare with another bike ＋ Add to garage All model years

Other years 2025 2026 2027

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail15%

Cornering80%

City riding88%

Daily riding85%

Touring50%

Two-up55%

Track45%

Best for: Designed as a versatile single-cylinder roadster that excels at city commuting, weekend cornering fun, and learning the ropes of a bigger machine.
Built for: Feels like a modern, torquey single with a premium chassis feel, upside-down forks, and radial brakes giving it a sportier edge than typical entry-level bikes.
Not ideal for: Not the right choice for riders wanting serious long-distance touring comfort, high-speed motorway cruising, or genuine off-road capability.

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 us

Your height

Inseam (optional)

Units

At 790mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2025 Triumph Speed 400, with a moderate knee angle of around 115 degrees and a forward-leaning 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 751-820 mm — Middle Ground →

Find bikes that fit your height →

Range and running costs

Worked out in your browser - nothing is sent to us

Units

Currency

Fuel per litre

Riding a year

Based on the published US (EPA-style) fuel economy estimate 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

Capacity: 398.0 ccm
Power: 39.4 HP (29.4 kW) @ 8000 RPM
CO2 Emissions: 100 CO2 g/km
EPA Certificate No.: STDXC.400IND-016
EPA Est. Fuel Consumption: 4.24 L/100km (55.5 US mpg)
EPA CO Emissions: 2.0 CO g/km
Torque: 37.5 Nm (3.8 kgf-m) @ 6500 RPM
Engine type: Single, four-stroke
Power/weight ratio: 0.2318 HP/kg (wet)
Bore x stroke: 89.0 x 64.0 mm
Compression: 12.0:1
Fuel system: Injection
Aspiration: Naturally aspirated
Valves per cylinder: 4

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet, multi-plate, slip & assist

Dimensions & weight

Wheelbase: 1377 mm
Overall width: 814 mm
Overall height: 1084 mm
Seat height: 790 mm
Wet weight: 170.0 kg
Fuel capacity: 13.00 litres
Dry weight: Not on record - add it

Chassis & suspension

Frame: Hybrid spine/perimeter, tubular steel, bolt-on rear subframe
Front suspension: 43mm upside down Big Piston forks. 140mm wheel travel
Rear suspension: Gas monoshock RSU with external reservoir and pre-load adjustment. 130mm wheel travel
Rake (fork angle): 24.6°
Trail: 102 mm
Rake: 24.6 º