1989 Miyata Touring 618GT

	46	50	54	57	60	63
Top Tube Length, Effective/Horizontal Unknown	500mm	535mm	545mm	560mm	570mm	580mm
Head Tube Angle	72deg	72deg	72deg	72deg	72deg	72deg
Seat Tube Angle	72deg	72deg	72deg	72deg	72deg	72deg
Bottom Bracket Drop	70.4mm	71.2mm	71.3mm	71.7mm	72mm	72mm
Bottom Bracket Height	272.6mm	271.8mm	271.7mm	271.3mm	271mm	271mm
Chainstay Length	445mm	445mm	445mm	445mm	445mm	445mm
Chainstay Length Horizontal	439.4mm	439.3mm	439.3mm	439.2mm	439.1mm	439.1mm
Front-Center	565mm	595mm	600mm	615mm	630mm	630mm
Front-Center Horizontal	560.6mm	590.7mm	595.8mm	610.8mm	625.9mm	625.9mm
Wheelbase	1000mm	1030mm	1035mm	1050mm	1065mm	1065mm
Fork Offset/Rake	60mm	60mm	60mm	60mm	60mm	60mm
Trail	48.4mm mid/neutral	48.4mm mid/neutral	48.4mm mid/neutral	48.4mm mid/neutral	48.4mm mid/neutral	48.4mm mid/neutral
Mechanical Trail	46mm	46mm	46mm	46mm	46mm	46mm
Wheel Flop	14.2mm	14.2mm	14.2mm	14.2mm	14.2mm	14.2mm
Tire to Pedal Spindle	50mm 172 mm cranks	80mm 172 mm cranks	85mm 172 mm cranks	100mm 172 mm cranks	115mm 172 mm cranks	115mm 172 mm cranks
Pedal Spindle to Ground Clearance	100.6mm 172 mm cranks	99.8mm 172 mm cranks	99.7mm 172 mm cranks	99.3mm 172 mm cranks	99mm 172 mm cranks	99mm 172 mm cranks

	46	50	54	57	60	63
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	686mm	686mm	686mm	686mm	686mm	686mm
Bike Length with Tires	1686mm	1716mm	1721mm	1736mm	1751mm	1751mm
Crank Length	172mm	172mm	172mm	172mm	172mm	172mm

Source:http://www.peterbrueggeman.com/cr/miyata-1989.pdf

Geometry