1988 Trek Bikes 1500 Base

	50cm	52cm	54cm	56cm	58cm	60cm	62cm
Seat Tube Length, C-T	500mm	520mm	540mm	560mm	580mm	600mm	620mm
Top Tube Length, Actual C-C	530mm	530mm	550mm	550mm	565mm	565mm	585mm
Head Tube Angle	73deg	73deg	73.5deg	73.5deg	73.5deg	73.5deg	74deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	259mm	259mm	259mm	259mm	259mm	259mm	259mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	408.7mm	408.7mm	408.7mm	408.7mm	408.7mm	408.7mm	408.7mm
Front-Center	563.9mm	563.9mm	578.8mm	578.8mm	598.6mm	598.6mm	603.6mm
Front-Center Horizontal	559.3mm	559.3mm	574.3mm	574.3mm	594.3mm	594.3mm	599.3mm
Wheelbase	968mm	968mm	983mm	983mm	1003mm	1003mm	1008mm
Fork Offset/Rake	42mm	42mm	42mm	42mm	42mm	42mm	42mm
Trail	57.3mm mid/neutral	57.3mm mid/neutral	54.2mm mid/neutral	54.2mm mid/neutral	54.2mm mid/neutral	54.2mm mid/neutral	51.2mm mid/neutral
Mechanical Trail	54.8mm	54.8mm	52mm	52mm	52mm	52mm	49.2mm
Wheel Flop	16mm	16mm	14.8mm	14.8mm	14.8mm	14.8mm	13.6mm
Tire to Pedal Spindle	62.9mm 170 mm cranks	62.9mm 170 mm cranks	77.8mm 170 mm cranks	77.8mm 170 mm cranks	97.6mm 170 mm cranks	97.6mm 170 mm cranks	102.6mm 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	89mm 170 mm cranks	89mm 170 mm cranks

Source:https://www.retrobike.co.uk/gallery2/d/98739-2/1988_20trek.pdf

Geometry