	S	M	L	XL
Stack	619mm	619mm	642mm	656mm
Reach	405mm	425mm	445mm	470mm
Stack to Reach Ratio	1.53:1	1.46:1	1.44:1	1.4:1
Seat Tube Length, Unknown	380mm	410mm	455mm	505mm
Top Tube Length, Effective/Horizontal Center	573mm	597mm	628mm	662mm
Top Tube Slope	26.6deg	22.7deg	19.7deg	15.6deg
Head Tube Angle	66.5deg	66.5deg	66.5deg	66.5deg
Seat Tube Angle	74.8deg	74.5deg	74.1deg	73.7deg
Head Tube Length	100mm	100mm	125mm	140mm
Bottom Bracket Drop	33mm	33mm	33mm	33mm
Bottom Bracket Height	336.4mm	336.4mm	336.4mm	336.4mm
Chainstay Length	437mm	437mm	437mm	437mm
Chainstay Length Horizontal	435.8mm	435.8mm	435.8mm	435.8mm
Front-Center	716mm	736mm	766mm	797mm
Front-Center Horizontal	715.3mm	735.3mm	765.3mm	796.3mm
Wheelbase	1151mm	1171mm	1201mm	1232mm
Fork Offset/Rake	51mm	51mm	51mm	51mm
Fork Length, Unknown	560mm	560mm	560mm	560mm
Trail	105mm very high	105mm very high	105mm very high	105mm very high
Mechanical Trail	96.3mm	96.3mm	96.3mm	96.3mm
Wheel Flop	38.4mm	38.4mm	38.4mm	38.4mm
Standover Height	756mm	762mm	775mm	776mm
Tire to Pedal Spindle	176.6mm 170 mm cranks	196.6mm 170 mm cranks	226.6mm 170 mm cranks	257.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	166.4mm 170 mm cranks	166.4mm 170 mm cranks	166.4mm 170 mm cranks	166.4mm 170 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

2020 Specialized Bicycles Stumpjumper Comp Alloy 29

Geometry