2017 Specialized Bicycles Sirrus Sport

	XS	S	M	L	XL
Stack	563mm	584mm	600mm	626mm	659mm
Reach	388mm	394mm	402mm	409mm	418mm
Stack to Reach Ratio	1.45:1	1.48:1	1.49:1	1.53:1	1.58:1
Seat Tube Length, C-T	395mm	440mm	485mm	530mm	570mm
Top Tube Length, Effective/Horizontal Center	555mm	570mm	580mm	600mm	620mm
Top Tube Slope	20.2deg	17.4deg	14deg	11.9deg	11deg
Head Tube Angle	70.5deg	71deg	71.5deg	72deg	72deg
Seat Tube Angle	73.5deg	73.3deg	73.5deg	73deg	73deg
Head Tube Length	130mm	150mm	165mm	190mm	225mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	273mm	273mm	273mm	273mm	273mm
Chainstay Length	445mm	445mm	445mm	445mm	445mm
Chainstay Length Horizontal	439.5mm	439.5mm	439.5mm	439.5mm	439.5mm
Front-Center	621mm	629mm	637mm	647mm	667mm
Front-Center Horizontal	616.5mm	625.5mm	633.5mm	642.5mm	663.5mm
Wheelbase	1056mm	1065mm	1073mm	1082mm	1103mm
Fork Offset/Rake	50.9mm	51.6mm	51.4mm	50.3mm	51.5mm
Fork Length, Unknown	410mm	410mm	410mm	410mm	410mm
Trail	67.5mm high	63.6mm mid/neutral	60.6mm mid/neutral	58.6mm mid/neutral	57.3mm mid/neutral
Mechanical Trail	63.6mm	60.1mm	57.4mm	55.7mm	54.5mm
Wheel Flop	21.2mm	19.6mm	18.2mm	17.2mm	16.8mm
Standover Height	716mm	750mm	786mm	821mm	859mm
Tire to Pedal Spindle	108mm 170 mm cranks	116mm 170 mm cranks	121.5mm 172.5 mm cranks	131.5mm 172.5 mm cranks	149mm 175 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	103mm 170 mm cranks	100.5mm 172.5 mm cranks	100.5mm 172.5 mm cranks	98mm 175 mm cranks

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Category Trend

Source:https://www.specialized.com/us/en/sirrus-sport/p/115229?color=208423-115229

Geometry