2017 Specialized Bicycles Men's Sirrus Expert Carbon

	S	M	L	XL
Stack	574mm	591mm	616mm	650mm
Reach	395mm	403mm	410mm	420mm
Stack to Reach Ratio	1.45:1	1.47:1	1.5:1	1.55:1
Seat Tube Length, C-T	440mm	485mm	530mm	570mm
Top Tube Length, Effective/Horizontal Center	568mm	578mm	598mm	619mm
Top Tube Slope	16.3deg	13.1deg	10.9deg	10.1deg
Head Tube Angle	71deg	71.5deg	72deg	72deg
Seat Tube Angle	73.3deg	73.5deg	73deg	73deg
Head Tube Length	150mm	165mm	190mm	225mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	271mm	271mm	271mm	271mm
Chainstay Length	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	429.3mm	429.3mm	429.3mm	429.3mm
Front-Center	627mm	635mm	645mm	666mm
Front-Center Horizontal	622.7mm	630.7mm	640.7mm	661.7mm
Wheelbase	1052mm	1060mm	1070mm	1091mm
Fork Offset/Rake	51mm	51mm	51mm	51mm
Fork Length, Unknown	398mm	398mm	398mm	398mm
Trail	63.5mm mid/neutral	60.3mm mid/neutral	57.2mm mid/neutral	57.2mm mid/neutral
Mechanical Trail	60mm	57.2mm	54.4mm	54.4mm
Wheel Flop	19.5mm	18.2mm	16.8mm	16.8mm
Standover Height	752.2mm	784.6mm	821.9mm	860.3mm
Tire to Pedal Spindle	116mm 170 mm cranks	121.5mm 172.5 mm cranks	131.5mm 172.5 mm cranks	150mm 175 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	98.5mm 172.5 mm cranks	98.5mm 172.5 mm cranks	96mm 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-expert-carbon/p/115193?color=208416-115193

Geometry