2021 Specialized Bicycles Men's Sirrus X

	XXS	XS	S	M	L	XL
Stack	536mm	555mm	563mm	593mm	608mm	633mm
Reach	373mm	388mm	393mm	398mm	402mm	414mm
Stack to Reach Ratio	1.44:1	1.43:1	1.43:1	1.49:1	1.51:1	1.53:1
Seat Tube Length, C-T	360mm	395mm	440mm	470mm	510mm	530mm
Top Tube Length, Effective/Horizontal Center	532mm	552mm	560mm	574mm	582mm	602mm
Top Tube Slope	21.9deg	19.4deg	15.2deg	15deg	12.3deg	12.5deg
Head Tube Angle	69.5deg	70deg	70deg	71deg	71deg	71deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Head Tube Length	121mm	139mm	147mm	175mm	191mm	217mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	283mm	283mm	283mm	283mm	283mm	283mm
Chainstay Length	440mm	440mm	440mm	440mm	440mm	440mm
Chainstay Length Horizontal	434.4mm	434.4mm	434.4mm	434.4mm	434.4mm	434.4mm
Front-Center	606mm	623mm	631mm	636mm	645mm	665mm
Front-Center Horizontal	601.6mm	618.6mm	626.6mm	632.6mm	641.6mm	661.6mm
Wheelbase	1036mm	1053mm	1061mm	1067mm	1076mm	1096mm
Fork Offset/Rake	51mm	51mm	51mm	51mm	51mm	51mm
Fork Length, Unknown	395mm	395mm	395mm	395mm	395mm	395mm
Trail	77.5mm high	74.2mm high	74.2mm high	67.6mm high	67.6mm high	67.6mm high
Mechanical Trail	72.6mm	69.7mm	69.7mm	63.9mm	63.9mm	63.9mm
Wheel Flop	25.4mm	23.9mm	23.9mm	20.8mm	20.8mm	20.8mm
Standover Height	702mm	725mm	755mm	785mm	815mm	837mm
Tire to Pedal Spindle	88mm 165 mm cranks	105mm 165 mm cranks	108mm 170 mm cranks	113mm 170 mm cranks	117mm 175 mm cranks	137mm 175 mm cranks
Pedal Spindle to Ground Clearance	118mm 165 mm cranks	118mm 165 mm cranks	113mm 170 mm cranks	113mm 170 mm cranks	108mm 175 mm cranks	108mm 175 mm cranks

	XXS	XS	S	M	L	XL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	42mm	42mm	42mm	42mm	42mm	42mm
Tire Outer Diameter	706mm	706mm	706mm	706mm	706mm	706mm
Bike Length with Tires	1742mm	1759mm	1767mm	1773mm	1782mm	1802mm
Crank Length	165mm	165mm	170mm	170mm	175mm	175mm
Handlebar Width	660mm	660mm	660mm	680mm	680mm	680mm
Stem Length	60mm	60mm	70mm	80mm	90mm	100mm

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-x-3-0/p/187462?color=301083-187462

Geometry