2019 Specialized Bicycles Men's Sirrus Elite Alloy

	S	M	L	XL	XXL
Stack	564mm	593mm	611mm	639mm	670mm
Reach	388mm	400mm	402mm	414mm	426mm
Stack to Reach Ratio	1.45:1	1.48:1	1.52:1	1.54:1	1.57:1
Seat Tube Length, C-T	415mm	455mm	495mm	535mm	565mm
Top Tube Length, Effective/Horizontal HT Top	555mm	576mm	583mm	604mm	631mm
Top Tube Slope	18.2deg	16.5deg	14.1deg	12.6deg	12.4deg
Head Tube Angle	70deg	71deg	71.5deg	72deg	72deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73deg
Head Tube Length	153mm	179mm	196mm	223mm	256mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	271mm	271mm	271mm	271mm	271mm
Chainstay Length	440mm	440mm	440mm	440mm	440mm
Chainstay Length Horizontal	434.4mm	434.4mm	434.4mm	434.4mm	434.4mm
Front-Center	626mm	638mm	641mm	656mm	679mm
Front-Center Horizontal	622.6mm	634.6mm	637.6mm	652.6mm	674.6mm
Wheelbase	1057mm	1069mm	1072mm	1087mm	1109mm
Fork Offset/Rake	51mm	51mm	51mm	51mm	51mm
Fork Length (Axle-To-Crown)	390mm	390mm	390mm	390mm	390mm
Trail	69.8mm high	63.5mm mid/neutral	60.3mm mid/neutral	57.2mm mid/neutral	57.2mm mid/neutral
Mechanical Trail	65.6mm	60mm	57.2mm	54.4mm	54.4mm
Wheel Flop	22.5mm	19.5mm	18.2mm	16.8mm	16.8mm
Standover Height	735mm	775mm	805mm	845mm	875mm
Tire to Pedal Spindle	115mm 170 mm cranks	127mm 170 mm cranks	127.5mm 172.5 mm cranks	142.5mm 172.5 mm cranks	163mm 175 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	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/mens-sirrus-elite-alloy/p/154505?color=225855-154505

Geometry