2021 Ventum Racing GS1 Frameset

	S	M	M/L	L	XL
Stack	522mm	545mm	570mm	589mm	604mm
Reach	365mm	374mm	383mm	392mm	401mm
Stack to Reach Ratio	1.43:1	1.46:1	1.49:1	1.5:1	1.51:1
Seat Tube Length, C-T	502mm	525mm	550mm	569mm	584mm
Top Tube Length, Effective/Horizontal HT Top	530mm	546mm	563mm	578mm	591mm
Top Tube Slope	4.8deg	4.8deg	4.7deg	4.7deg	4.7deg
Head Tube Angle	69.5deg	70deg	71deg	72deg	72.5deg
Seat Tube Angle	72.5deg	72.5deg	72.5deg	72.5deg	72.5deg
Head Tube Length	105mm	128mm	150mm	166mm	180mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	283mm	283mm	283mm	283mm	283mm
Chainstay Length	420mm	420mm	420mm	420mm	420mm
Chainstay Length Horizontal	414.1mm	414.1mm	414.1mm	414.1mm	414.1mm
Front-Center	592mm	604mm	612mm	617mm	626mm
Front-Center Horizontal	587.9mm	599.9mm	607.9mm	612.9mm	621.9mm
Wheelbase	1002mm	1014mm	1022mm	1027mm	1036mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm
Fork Length (On-Axis)	394mm	394mm	394mm	394mm	394mm
Trail	83.9mm very high	80.6mm very high	74mm high	67.4mm high	64.1mm mid/neutral
Mechanical Trail	78.6mm	75.7mm	69.9mm	64.1mm	61.2mm
Wheel Flop	27.5mm	25.9mm	22.8mm	19.8mm	18.4mm
Tire to Pedal Spindle	69mm 170 mm cranks	81mm 170 mm cranks	89mm 170 mm cranks	94mm 170 mm cranks	103mm 170 mm cranks
Pedal Spindle to Ground Clearance	113mm 170 mm cranks	113mm 170 mm cranks	113mm 170 mm cranks	113mm 170 mm cranks	113mm 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

Source:https://ventumracing.com/gravel/#size-chart

Geometry