2019 Specialized Bicycles Men's Sirrus Pro Carbon

	S	M	L	XL	XXL
Stack	602mm	631mm	649mm	687mm	709mm
Reach	371mm	384mm	386mm	398mm	410mm
Stack to Reach Ratio	1.62:1	1.64:1	1.68:1	1.73:1	1.73:1
Seat Tube Length, C-T	416mm	452.8mm	483mm	533mm	563mm
Top Tube Length, Effective/Horizontal HT Top	554mm	573mm	580mm	603mm	628mm
Top Tube Slope	22.6deg	21deg	19.6deg	17.8deg	16.5deg
Head Tube Angle	70deg	71deg	71.5deg	72deg	72deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73deg
Head Tube Length	143mm	169mm	186mm	223mm	246mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	271mm	271mm	271mm	271mm	271mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	429.3mm	429.3mm	429.3mm	429.3mm	429.3mm
Front-Center	625mm	635mm	637mm	656mm	675mm
Front-Center Horizontal	620.7mm	630.7mm	633.7mm	652.7mm	671.7mm
Wheelbase	1050mm	1060mm	1063mm	1082mm	1101mm
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	756mm	788mm	813mm	849mm	875mm
Tire to Pedal Spindle	114mm 170 mm cranks	124mm 170 mm cranks	123.5mm 172.5 mm cranks	142.5mm 172.5 mm cranks	159mm 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-pro-carbon/p/154508?color=240187-154508

Geometry