| MODEL | TRIUMPH SPEED 400 2024 |
| Year | 2024 |
| Engine Type | Single cylinder, four stroke, DOHC, 4 valves, TR-Series |
| Displacement / Capacity | 398 cc |
| Bore X Stroke | 89.0 x 64.0 mm |
| Compression Ratio | 12.1:1 |
| Cooling System | Liquid cooled |
| Max Power | 29.4 kW / 40 hp @ 8000 rpm |
| Max Torque | 38 Nm / 28 lb-ft @ 6500 rpm |
| Ignition | — |
| Induction | Bosch ride-by-wire electronic fuel injection |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | Wet, multi-plate, assist and slip |
| Final Drive | X-ring chain |
| CHASSIS SPECS | |
| Frame | Hybrid spine / perimeter tubular steel, bolt-on rear subframe |
| Front Suspension | 43 mm Showa Big Piston inverted fork, non-adjustable; 139.7 mm / 5.5 in travel |
| Rear Suspension | Cast aluminium twin-sided swingarm, single shock with external reservoir, preload adjustable; 129.4 mm / 5.1 in travel |
| Front Brakes | Single 300 mm disc, radial 4-piston caliper, Bosch dual-channel ABS |
| Rear Brakes | Single 230 mm disc, floating caliper, ABS |
| DIMENSION SPECS | |
| Overall Length | 2056 mm |
| Overall Width | 795 mm |
| Overall Height | 1075 mm |
| Seat Height | 790 mm / 31.1 in |
| Wheelbase | 1377 mm / 54.2 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 170 kg / 375 lb |
| WHEEL SPECS | |
| Front Tyre | 110/70 R17 |
| Rear Tyre | 150/60 R17 |
| FUEL SYSTEM | |
| Fuel Capacity | 13 Litres / 3.43 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The Speed 400 is Triumph's entry-level modern-classic roadster, built around the all-new liquid-cooled 398 cc TR-Series single and designed in Hinckley. It has retro touches such as a finned head, sculpted tank and upswept silencer, with switchable traction control, a torque-assist clutch, LED lighting and a 10,000-mile service interval. It was offered in Carnival Red, Caspian Blue and Phantom Black.
