2025 Specialized Sirrus x 4.0

	XXS	XS	S	M	L	XL
Stack	587mm	590mm	606mm	635mm	651mm	672mm
Reach	355mm	371mm	376mm	382mm	386mm	398mm
Stack to Reach Ratio	1.65:1	1.59:1	1.61:1	1.66:1	1.69:1	1.69:1
Seat Tube Length, Unknown	300mm	300mm	350mm	350mm	400mm	400mm
Seat Tube Length, Effective Center	360mm	395mm	440mm	470mm	510mm	530mm
Top Tube Length, Effective/Horizontal Center	529mm	549mm	559mm	573mm	581mm	599mm
Top Tube Slope	34.2deg	33.5deg	29.6deg	31.9deg	28.2deg	29.4deg
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	111mm	125mm	143mm	169mm	186mm	208mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	279mm	279mm	279mm	279mm	279mm	279mm
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	602mm	618mm	629mm	634mm	644mm	663mm
Front-Center Horizontal	598.6mm	614.6mm	625.6mm	630.6mm	639.6mm	658.6mm
Wheelbase	1033mm	1049mm	1060mm	1065mm	1074mm	1093mm
Fork Offset/Rake	51mm	51mm	51mm	51mm	51mm	51mm
Fork Length, Unknown	395mm	395mm	395mm	395mm	395mm	395mm
Trail	76mm high	72.8mm high	72.8mm high	66.2mm high	66.2mm high	66.2mm high
Mechanical Trail	71.2mm	68.4mm	68.4mm	62.6mm	62.6mm	62.6mm
Wheel Flop	24.9mm	23.4mm	23.4mm	20.4mm	20.4mm	20.4mm
Standover Height	700mm	722mm	750mm	778mm	810mm	831mm
Tire to Pedal Spindle	88mm 165 mm cranks	104mm 165 mm cranks	110mm 170 mm cranks	115mm 170 mm cranks	120mm 175 mm cranks	139mm 175 mm cranks
Pedal Spindle to Ground Clearance	114mm 165 mm cranks	114mm 165 mm cranks	109mm 170 mm cranks	109mm 170 mm cranks	104mm 175 mm cranks	104mm 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	38mm	38mm	38mm	38mm	38mm	38mm
Tire Outer Diameter	698mm	698mm	698mm	698mm	698mm	698mm
Bike Length with Tires	1731mm	1747mm	1758mm	1763mm	1772mm	1791mm
Crank Length	165mm	165mm	170mm	170mm	175mm	175mm
Handlebar Width	680mm	680mm	680mm	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/ca/en/sirrus-x-40/p/4278562?color=5444607-4278562

Geometry