Harley-Davidson Softail Fat Boy S 2017 vs. Harley-Davidson Softail Street Bob FXBB 2020

Technical Specifications Harley-Davidson Softail Fat Boy S 2017 compared to Harley-Davidson Softail Street Bob FXBB 2020

Harley-Davidson Softail Fat Boy S 2017

Harley-Davidson Softail Street Bob FXBB 2020

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Differences

Harley-Davidson Softail Fat Boy S 2017

Harley-Davidson Softail Street Bob FXBB 2020

Engine and Drive Train

Engine type	Engine type	V	Engine type	V
Bore	Bore	101.6 mm	Bore	100 mm
Stroke	Stroke	111.1 mm	Stroke	111.1 mm
Engine power	Engine power	92 HP	Engine power	86 HP
Rpm at Max. Power	Rpm at Max. Power	5,010 rpm	Rpm at Max. Power	5,020 rpm
Torque	Torque	146 Nm	Torque	145 Nm
Rpm at Torque	Rpm at Torque	4,000 rpm	Rpm at Torque	3,000 rpm
Compression Ratio	Compression Ratio	9.2	Compression Ratio	10
Fuel system	Fuel system	Injection	Fuel system	Injection
Starter	Starter	Electric	Starter	Electric
Clutch Type	Clutch Type	Multiplate in oil-bath	Clutch Type	Multiplate in oil-bath
Ignition	Ignition	Transistor	Ignition	Transistor
Transmission	Transmission	Belt	Transmission	Belt
Number of gears	Number of gears	6	Number of gears	6
Cylinders	Cylinders	2	Cylinders	2
Valves	Valves	OHV	Valves	OHV
Cooling	Cooling	Air	Cooling	Air
Displacement	Displacement	1,801 ccm	Displacement	1,745 ccm

Suspension Front

Front suspension	Front suspension	Telescopic fork	Front suspension	Telescopic fork

Chassis

Frame	Frame	Steel	Frame	Steel
Frame type	Frame type	Double cradle	Frame type	Double cradle
Rake	Rake	31.6 degree	Rake	30 degree
Trail	Trail	147 mm	Trail	157 mm

Brakes Front

Type	Type	Single disk	Type	Single disk
Piston	Piston	Four pistons	Piston	Four pistons
Shock mount	Shock mount	Fixed caliper	Shock mount	Fixed caliper

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	140 mm	Front tyre width	100 mm
Front tyre height	Front tyre height	75 %	Front tyre height	90 %
Front tyre diameter	Front tyre diameter	17 inch	Front tyre diameter	19 inch
Rear tyre width	Rear tyre width	200 mm	Rear tyre width	150 mm
Rear tyre height	Rear tyre height	55 %	Rear tyre height	80 %
Rear tyre diameter	Rear tyre diameter	17 inch	Rear tyre diameter	16 inch
Length	Length	2,385 mm	Length	2,320 mm
Wheelbase	Wheelbase	1,630 mm	Wheelbase	1,630 mm
Seat Height	Seat Height	670 mm	Seat Height	680 mm
Fuel Tank Capacity	Fuel Tank Capacity	18.9 l	Fuel Tank Capacity	13.2 l
License compliancy	License compliancy	A	License compliancy	A