1983 Specialized Bicycles Expedition Base

	47	51	54	56	58	60	62	65	68
Stack	509.1mm	532.9mm	555.5mm	571.6mm	590.8mm	608.9mm	628mm	656.8mm	685.6mm
Reach	342.1mm	354.5mm	372.2mm	389.8mm	394.3mm	399.7mm	409mm	415.5mm	406.9mm
Stack to Reach Ratio	1.49:1	1.5:1	1.49:1	1.47:1	1.5:1	1.52:1	1.54:1	1.58:1	1.68:1
Seat Tube Length, C-C	470mm	510mm	540mm	560mm	580mm	600mm	620mm	650mm	680mm
Top Tube Length, Effective/Horizontal Center	514.4mm	524.1mm	538.4mm	555mm	565mm	580mm	595mm	610mm	610mm
Top Tube Length, Actual C-C	505mm	520mm	537mm	555mm	565mm	580mm	595mm	610mm	610mm
Top Tube Slope	3.5deg	1.5deg	0.5deg	0deg	0deg	0deg	0deg	0deg	0deg
Head Tube Angle	68.5deg	70deg	71deg	72deg	72deg	73.5deg	73.5deg	73.5deg	73.5deg
Seat Tube Angle	71.5deg	72.5deg	73.5deg	74deg	74deg	73.5deg	73.5deg	73.5deg	73.5deg
Bottom Bracket Drop	63.7mm	63.8mm	67.9mm	68.1mm	72.1mm	68.5mm	64.7mm	65mm	65mm
Bottom Bracket Height	275.3mm	275.2mm	271.2mm	270.9mm	267mm	270.5mm	274.3mm	274mm	274mm
Chainstay Length	450mm	450mm	450mm	450mm	450mm	450mm	450mm	450mm	450mm
Chainstay Length Horizontal	445.5mm	445.5mm	444.9mm	444.8mm	444.2mm	444.8mm	445.3mm	445.3mm	445.3mm
Front-Center	585mm	592mm	599mm	610mm	621mm	626mm	632mm	647mm	647mm
Front-Center Horizontal	581.5mm	588.6mm	595.1mm	606.2mm	616.8mm	622.2mm	628.7mm	643.7mm	643.7mm
Wheelbase	1027mm	1034mm	1040mm	1051mm	1061mm	1067mm	1074mm	1089mm	1089mm
Fork Offset/Rake	60mm	60mm	51mm	51mm	51mm	51mm	51mm	51mm	51mm
Trail	69.1mm high	59.5mm mid/neutral	62.8mm mid/neutral	56.5mm mid/neutral	56.5mm mid/neutral	47.2mm mid/neutral	47.2mm mid/neutral	47.2mm mid/neutral	47.2mm mid/neutral
Mechanical Trail	64.2mm	55.9mm	59.4mm	53.8mm	53.8mm	45.3mm	45.3mm	45.3mm	45.3mm
Wheel Flop	23.6mm	19.1mm	19.3mm	16.6mm	16.6mm	12.9mm	12.9mm	12.9mm	12.9mm
Tire to Pedal Spindle	76mm 170 mm cranks	83mm 170 mm cranks	90mm 170 mm cranks	101mm 170 mm cranks	112mm 170 mm cranks	117mm 170 mm cranks	123mm 170 mm cranks	138mm 170 mm cranks	138mm 170 mm cranks
Pedal Spindle to Ground Clearance	105.3mm 170 mm cranks	105.2mm 170 mm cranks	101.2mm 170 mm cranks	100.9mm 170 mm cranks	97mm 170 mm cranks	100.5mm 170 mm cranks	104.3mm 170 mm cranks	104mm 170 mm cranks	104mm 170 mm cranks

	47	51	54	56	58	60	62	65	68
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	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1705mm	1712mm	1718mm	1729mm	1739mm	1745mm	1752mm	1767mm	1767mm

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

Touring

Source:http://crankbased.blogspot.com/2015/01/1983-specialized-expedition.html

Suggest Bike Edit

1983 Specialized Bicycles Expedition Base

Geometry

Base Build

Stack and Reach vs. Category Trend