1984 Raleigh Bikes Portage Base

	19"	21"	23"	25"
Stack	501.8mm	541.9mm	587.4mm	635.7mm
Reach	375.6mm	373.5mm	368mm	371.3mm
Stack to Reach Ratio	1.34:1	1.45:1	1.6:1	1.71:1
Seat Tube Length, C-TTT	501.7mm	546.1mm	596.9mm	647.7mm
Top Tube Length, Effective/Horizontal Center	520.7mm	539.8mm	558.8mm	577.9mm
Top Tube Length, Actual C-C	520.7mm	539.8mm	558.8mm	577.9mm
Top Tube Slope	0deg	0deg	0deg	0deg
Head Tube Angle	72deg	72deg	72deg	72deg
Seat Tube Angle	74deg	73deg	72deg	72deg
Bottom Bracket Drop	69.9mm	69.9mm	69.9mm	69.9mm
Bottom Bracket Height	257.2mm	257.2mm	257.2mm	257.2mm
Chainstay Length	444.5mm	444.5mm	444.5mm	444.5mm
Chainstay Length Horizontal	439mm	439mm	439mm	439mm
Front-Center	568.6mm	574.9mm	587.5mm	606.5mm
Front-Center Horizontal	564.3mm	570.7mm	583.4mm	602.4mm
Wheelbase	1003.3mm	1009.7mm	1022.3mm	1041.4mm
Fork Offset/Rake	55.9mm	55.9mm	55.9mm	55.9mm
Trail	47.5mm mid/neutral	47.5mm mid/neutral	47.5mm mid/neutral	47.5mm mid/neutral
Mechanical Trail	45.2mm	45.2mm	45.2mm	45.2mm
Wheel Flop	14mm	14mm	14mm	14mm
Tire to Pedal Spindle	71.6mm 170 mm cranks	77.9mm 170 mm cranks	90.5mm 170 mm cranks	109.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	87.2mm 170 mm cranks	87.2mm 170 mm cranks	87.2mm 170 mm cranks	87.2mm 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://simplicityvintagecycles.files.wordpress.com/2013/11/1984_raleigh_touring_catalogue.pdf

Geometry