2018 Triumph Speed Triple S Technical Analysis & Specification Breakdown
At the heart of the 2018 Triumph Speed Triple S naked motorcycle, Triumph relies on a 1050 cc (64.1 cu in) liquid-cooled in-line three, four-stroke powerplant. In factory specification, peak output is rated at 148 HP (108 kW) at 10,500 rpm while maximum torque reaches 116.6 Nm (86 lb-ft) at 7,150 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 141 HP per liter and a 3,350 rpm working window between peak torque (7,150 rpm) and peak power (10,500 rpm), the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the Speed Triple S measures 192 kg (423 lbs) dry, translating to a power-to-weight ratio of 0.77 HP/kg (1.3 kg per horsepower). Rider ergonomics and chassis geometry center around a 825 mm (32.5 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,445 mm (56.9 in) wheelbase engineered for balanced agility and highway composure. The 15.5-liter (4.1 US gal) fuel tank paired with a rated consumption of 5.2 L/100 km provides an estimated theoretical range of roughly 298 km (185 miles) between fill-ups.
Within MotoLibrary's Triumph archive, this model family spans 5 indexed model years from 2016 to 2020, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
141 HP/L
Power-to-Weight
0.77 HP/kg (1.3 kg/HP)
Power Band Window
7,150–10,500 rpm
Theoretical Range
~298 km (185 mi)
Engine
Displacement1050.0 ccm (64.07 cubic inches)
Engine TypeIn-line three, four-stroke
Power148.0 HP (108.0 kW)) @ 10500 RPM
Torque116.6 Nm (11.9 kgf-m or 86.0 ft.lbs) @ 7150 RPM
Compression12.3:1
Bore x Stroke79.0 x 71.4 mm (3.1 x 2.8 inches)
Valves/Cylinder4
Fuel SystemInjection. Multipoint sequential electronic fuel injection with SAI
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet, multi-plate slip assist cltuch
DrivelineX ring chain
Performance
Fuel Consumption5.20 litres/100 km (19.2 km/l or 45.23 mpg)
Greenhouse Gases120.6 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustStainless Steel 3 into 1 into 2. twin high level stainless steel pipes.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
