Triumph Bonneville Speedmaster 2020 vs. Triumph Thunderbird Commander 2017

Technical Specifications Triumph Bonneville Speedmaster 2020 compared to Triumph Thunderbird Commander 2017

Triumph Bonneville Speedmaster 2020

Triumph Thunderbird Commander 2017

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Differences

Triumph Bonneville Speedmaster 2020

Triumph Thunderbird Commander 2017

Engine and Drive Train

Engine type	Engine type	In line crankpin offset	Engine type	In line crankpin offset
Stroke	Stroke	80 mm	Stroke	94.3 mm
Engine power	Engine power	77 HP	Engine power	94 HP
Rpm at Max. Power	Rpm at Max. Power	6,100 rpm	Rpm at Max. Power	5,400 rpm
Torque	Torque	106 Nm	Torque	151 Nm
Rpm at Torque	Rpm at Torque	4,000 rpm	Rpm at Torque	3,550 rpm
Compression Ratio	Compression Ratio	10	Compression Ratio	9.7
Clutch Type	Clutch Type	Multiplate in oil-bath	Clutch Type	Multiplate in oil-bath
Transmission	Transmission	Chain	Transmission	Belt
Number of gears	Number of gears	6	Number of gears	6
Valves	Valves	OHC	Valves	DOHC
Cooling	Cooling	liquid	Cooling	liquid
Displacement	Displacement	1,200 ccm	Displacement	1,699 ccm

Suspension Front

Front suspension	Front suspension	Telescopic fork	Front suspension	Telescopic fork
Brand	Brand	Kayaba	Brand	Showa

Suspension Rear

Shock absorber	Shock absorber	Monoshock	Shock absorber	Dual Shock

Chassis

Frame	Frame	Steel	Frame	Steel
Frame type	Frame type	Central tube	Frame type	Twin Tube

Brakes Front

Piston	Piston	Double piston	Piston	Four pistons
Brand	Brand	Nissin	Brand	Nissin

Brakes Rear

Type	Type	Disc	Type	Disc
Piston	Piston	Double piston	Piston	Double piston
Shock mount	Shock mount	Floating caliper	Shock mount	Floating caliper

Dimensions and Weights

Front tyre width	Front tyre width	130 mm	Front tyre width	140 mm
Front tyre height	Front tyre height	90 %	Front tyre height	75 %
Front tyre diameter	Front tyre diameter	16 inch	Front tyre diameter	17 inch
Rear tyre width	Rear tyre width	150 mm	Rear tyre width	200 mm
Rear tyre height	Rear tyre height	80 %	Rear tyre height	50 %
Rear tyre diameter	Rear tyre diameter	16 inch	Rear tyre diameter	17 inch
Length	Length	2,170 mm	Length	2,442 mm
Width	Width	785 mm	Width	990 mm
Height	Height	1,125 mm	Height	1,225 mm
Wheelbase	Wheelbase	1,500 mm	Wheelbase	1,665 mm
Seat Height	Seat Height	705 mm	Seat Height	700 mm
Fuel Tank Capacity	Fuel Tank Capacity	12 l	Fuel Tank Capacity	22 l
License compliancy	License compliancy	A	License compliancy	A