1990 Trek Bikes 950 Base

	16.5	18	20	22
Stack	419.2mm	455.7mm	504.3mm	552.9mm
Reach	421.4mm	425.8mm	418.6mm	413.9mm
Stack to Reach Ratio	0.99:1	1.07:1	1.2:1	1.34:1
Seat Tube Length, C-C	403.9mm	442mm	492.8mm	543.6mm
Top Tube Length, Effective/Horizontal Center	551.2mm	566.4mm	574mm	584.2mm
Top Tube Length, Actual C-C	551.2mm	566.4mm	574mm	584.2mm
Top Tube Slope	0deg	0deg	0deg	0deg
Head Tube Angle	70.5deg	71deg	71deg	71deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Bottom Bracket Drop	35.7mm	33.1mm	33.1mm	30.6mm
Bottom Bracket Height	292.1mm	294.6mm	294.6mm	297.2mm
Chainstay Length	429.3mm	429.3mm	429.3mm	429.3mm
Chainstay Length Horizontal	427.8mm	428mm	428mm	428.2mm
Front-Center	624.8mm	627mm	629.5mm	641.9mm
Front-Center Horizontal	623.8mm	626.1mm	628.7mm	641.2mm
Wheelbase	1051.6mm	1054.1mm	1056.6mm	1069.3mm
Fork Offset/Rake	45.7mm	45.7mm	45.7mm	45.7mm
Trail	67.6mm high	64.5mm mid/neutral	64.5mm mid/neutral	64.5mm mid/neutral
Mechanical Trail	63.7mm	61mm	61mm	61mm
Wheel Flop	21.3mm	19.9mm	19.9mm	19.9mm
Tire to Pedal Spindle	127mm 170 mm cranks	129.2mm 170 mm cranks	131.8mm 170 mm cranks	144.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	122.1mm 170 mm cranks	124.6mm 170 mm cranks	124.6mm 170 mm cranks	127.2mm 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:http://www.vintage-trek.com/images/trek/90Trek/90Trek.pdf

Geometry