1987 Trek Bikes 560EX Base

	19"	21"	22.5"	24"	25.5"
Stack	488.7mm	532.8mm	569.5mm	604.9mm	642.3mm
Reach	390.3mm	391.2mm	391mm	395.5mm	394.4mm
Stack to Reach Ratio	1.25:1	1.36:1	1.46:1	1.53:1	1.63:1
Seat Tube Length, C-C	475mm	521mm	559mm	596mm	635mm
Top Tube Length, Effective/Horizontal Center	536mm	550mm	560mm	575mm	585mm
Top Tube Length, Actual C-C	536mm	550mm	560mm	575mm	585mm
Top Tube Slope	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	72deg	72deg	73deg	73deg	73deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	259mm	259mm	259mm	259mm	259mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	408.7mm	408.7mm	408.7mm	408.7mm	408.7mm
Front-Center	572.8mm	586.7mm	599.6mm	604.6mm	613.5mm
Front-Center Horizontal	568.3mm	582.3mm	595.3mm	600.3mm	609.3mm
Wheelbase	977mm	991mm	1004mm	1009mm	1018mm
Fork Offset/Rake	42mm	42mm	42mm	42mm	42mm
Trail	63.4mm mid/neutral	63.4mm mid/neutral	57.3mm mid/neutral	57.3mm mid/neutral	57.3mm mid/neutral
Mechanical Trail	60.3mm	60.3mm	54.8mm	54.8mm	54.8mm
Wheel Flop	18.6mm	18.6mm	16mm	16mm	16mm
Tire to Pedal Spindle	71.8mm 170 mm cranks	85.7mm 170 mm cranks	98.6mm 170 mm cranks	103.6mm 170 mm cranks	112.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks	89mm 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://vintage-trek.com/images/trek/1987/87Trek21.jpg

Geometry