| MODEL | TRIUMPH STREET TWIN 2021 |
| Year | 2021 |
| Engine Type | Four-stroke, 270 degree crank angle parallel twin, SOHC, 4 valves per cylinder |
| Displacement / Capacity | 900 cc / 54.9 cu in |
| Bore X Stroke | 84.6 x 80 mm |
| Compression Ratio | 11.0:1 |
| Cooling System | Liquid cooled |
| Max Power | 47.8 kW / 64.1 hp @ 7500 rpm |
| Max Torque | 80 Nm / 59 lb-ft @ 3800 rpm |
| Ignition | Digital |
| Induction | Multipoint sequential electronic fuel injection, ride-by-wire |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 5-speed |
| Clutch | Wet, multi-plate, torque assist |
| Final Drive | O-ring chain |
| CHASSIS SPECS | |
| Frame | Tubular steel cradle, twin-sided fabrication swingarm |
| Front Suspension | 41 mm Kayaba fork, non-adjustable, cartridge damping, 120 mm / 4.7 in travel |
| Rear Suspension | Twin units with preload adjustment, 120 mm / 4.7 in travel |
| Front Brakes | Single 310 mm floating disc, Brembo 4-piston fixed axial caliper, ABS |
| Rear Brakes | Single 255 mm disc, Nissin 2-piston floating caliper, ABS |
| DIMENSION SPECS | |
| Overall Length | 2095 mm / 82.5 in |
| Overall Width | 780 mm / 30.7 in |
| Overall Height | 1110 mm / 43.7 in |
| Seat Height | 765 mm / 30.1 in |
| Wheelbase | 1415 mm / 55.7 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 216 kg / 476 lb |
| WHEEL SPECS | |
| Front Tyre | 100/90-18 |
| Rear Tyre | 150/70 R17 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 2021 Street Twin was revised to meet Euro 5 while keeping the character of the 900 cc high-torque twin. It received new cast wheels, a thicker bench seat, updated bodywork and brushed aluminium detailing, plus three colours. Rain and Road modes, traction control and ABS are standard.
