1990 Miyata Alumicross Base

	46	48	50	52	54	56	58	60	63
Stack	473mm	492.1mm	511.4mm	530.6mm	549.7mm	568.8mm	588.1mm	607.3mm	635.9mm
Reach	354.1mm	363.3mm	368mm	372.2mm	376.3mm	375.5mm	380.2mm	379.3mm	375.6mm
Stack to Reach Ratio	1.34:1	1.35:1	1.39:1	1.43:1	1.46:1	1.52:1	1.55:1	1.6:1	1.69:1
Seat Tube Length, C-C	460mm	480mm	500mm	520mm	540mm	560mm	580mm	600mm	630mm
Top Tube Length, Effective/Horizontal Center	500mm	515mm	525mm	535mm	545mm	550mm	560mm	565mm	570mm
Top Tube Length, Actual C-C	500mm	515mm	525mm	535mm	545mm	550mm	560mm	565mm	570mm
Top Tube Slope	0deg	0deg	0deg	0deg	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	71deg	71deg	72deg	72deg	72deg	72deg	73deg	73deg	73deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg	73deg	73deg	73deg	73deg
Head Tube Length	31.5mm	73.2mm	87.2mm	107.2mm	124.9mm	144.9mm	158.9mm	178.9mm	208.9mm
Bottom Bracket Drop	70mm	49.6mm	49.7mm	49.8mm	49.9mm	50mm	50.1mm	50.1mm	50.1mm
Bottom Bracket Height	276mm	296.4mm	296.3mm	296.2mm	296.1mm	296mm	295.9mm	295.9mm	295.9mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	424.3mm	427.1mm	427.1mm	427.1mm	427.1mm	427.1mm	427.1mm	427.1mm	427.1mm
Front-Center	575mm	580mm	585mm	590mm	595mm	600mm	605mm	605mm	605mm
Front-Center Horizontal	570.7mm	577.9mm	582.9mm	587.9mm	592.9mm	597.9mm	602.9mm	602.9mm	602.9mm
Wheelbase	995mm	1005mm	1010mm	1015mm	1020mm	1025mm	1030mm	1030mm	1030mm
Fork Offset/Rake	60mm	60mm	55mm	55mm	50mm	50mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	400mm	400mm	400mm	400mm	400mm	400mm	400mm	400mm	400mm
Trail	55.7mm mid/neutral	55.7mm mid/neutral	54.6mm mid/neutral	54.6mm mid/neutral	59.9mm mid/neutral	59.9mm mid/neutral	58.7mm mid/neutral	58.7mm mid/neutral	58.7mm mid/neutral
Mechanical Trail	52.7mm	52.7mm	51.9mm	51.9mm	56.9mm	56.9mm	56.2mm	56.2mm	56.2mm
Wheel Flop	17.1mm	17.1mm	16mm	16mm	17.6mm	17.6mm	16.4mm	16.4mm	16.4mm
Tire to Pedal Spindle	59mm 170 mm cranks	64mm 170 mm cranks	69mm 170 mm cranks	74mm 170 mm cranks	79mm 170 mm cranks	84mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks	89mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	126.4mm 170 mm cranks	126.3mm 170 mm cranks	126.2mm 170 mm cranks	126.1mm 170 mm cranks	126mm 170 mm cranks	125.9mm 170 mm cranks	125.9mm 170 mm cranks	125.9mm 170 mm cranks

	46	48	50	52	54	56	58	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	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	35mm	35mm	35mm	35mm	35mm	35mm	35mm	35mm	35mm
Tire Outer Diameter	692mm	692mm	692mm	692mm	692mm	692mm	692mm	692mm	692mm
Bike Length with Tires	1687mm	1697mm	1702mm	1707mm	1712mm	1717mm	1722mm	1722mm	1722mm

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.

Learn more about the Upright/Aggressive Scale

Category Trend

Cyclocross

Source:https://www.ragandbone.ca/PDFs/Miyata%20Catalogue%20PDFs/Miyata%20Catalogue%2090.pdf

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1990 Miyata Alumicross Base

Geometry

Base Build

Stack and Reach vs. Category Trend