2004 Jamis Bicycles Ventura Base

	XS	S	M	L	XL
Stack	535mm	556mm	573mm	598mm	600mm
Reach	360mm	366mm	373mm	376mm	408mm
Stack to Reach Ratio	1.49:1	1.52:1	1.54:1	1.59:1	1.47:1
Seat Tube Length, C-TTT	406mm	456mm	491mm	512mm	547mm
Top Tube Length, Effective/Horizontal HT Top	500mm	530mm	550mm	575mm	600mm
Top Tube Slope	14.7deg	11.1deg	9deg	9.5deg	5.9deg
Head Tube Angle	72.5deg	72.5deg	73deg	73.5deg	74deg
Seat Tube Angle	75deg	75deg	74.5deg	73deg	72.5deg
Head Tube Length	110mm	130mm	135mm	175mm	200mm
Bottom Bracket Drop	71mm	69.5mm	68mm	68mm	66.5mm
Bottom Bracket Height	263mm	264.5mm	266mm	266mm	267.5mm
Chainstay Length	390mm	406mm	410mm	415mm	415mm
Chainstay Length Horizontal	383.5mm	400mm	404.3mm	409.4mm	409.6mm
Front-Center	547.1mm	577.2mm	592.6mm	598.5mm	613mm
Front-Center Horizontal	542.5mm	573mm	588.7mm	594.6mm	609.4mm
Wheelbase	926mm	973mm	993mm	1004mm	1019mm
Fork Offset/Rake	35mm	42mm	42mm	42mm	42mm
Trail	68.6mm high	61.3mm mid/neutral	58.2mm mid/neutral	55.1mm mid/neutral	52.1mm mid/neutral
Mechanical Trail	65.4mm	58.4mm	55.7mm	52.9mm	50.1mm
Wheel Flop	19.7mm	17.6mm	16.3mm	15mm	13.8mm
Standover Height	685mm	740mm	761mm	789mm	818mm
Tire to Pedal Spindle	48.1mm 165 mm cranks	73.2mm 170 mm cranks	86.1mm 172.5 mm cranks	89.5mm 175 mm cranks	104mm 175 mm cranks
Pedal Spindle to Ground Clearance	98mm 165 mm cranks	94.5mm 170 mm cranks	93.5mm 172.5 mm cranks	91mm 175 mm cranks	92.5mm 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.jamisbikes.com/catalog_archive/04_JAMIS_CATALOG.pdf

Geometry