1983 Trek Bikes 620 Base

Category
Touring
Design
Drop Bar, Rigid, non-suspension corrected
Frame
Steel
Fork
Steel
Features
Rim brake

Geometry

22.5
19in
Stack
569mm
Reach
386mm
Stack to Reach Ratio
1.47:1
Seat Tube Length, C-C
560mm
Seat Tube Length, Unknown
475mm
Top Tube Length, Effective/Horizontal Center
560mm
Top Tube Length, Effective/Horizontal Unknown
536mm
Top Tube Length, Actual C-C
560mm
Top Tube Slope
0deg
Head Tube Angle
73deg
72deg
Seat Tube Angle
73deg
73.5deg
Bottom Bracket Drop
72mm
72mm
Bottom Bracket Height
271mm
271mm
Chainstay Length
440mm
470mm
Chainstay Length Horizontal
434.1mm
464.5mm
Front-Center
598.3mm
585mm
Front-Center Horizontal
593.9mm
580.6mm
Wheelbase
1028mm
1045mm
Fork Offset/Rake
55mm
52mm
Trail
47.4mm
mid/​neutral
56.8mm
mid/​neutral
Mechanical Trail
45.3mm
54mm
Wheel Flop
13.2mm
16.7mm
Tire to Pedal Spindle
85.3mm
170 mm cranks
72mm
170 mm cranks
Pedal Spindle to Ground Clearance
101mm
170 mm cranks
101mm
170 mm cranks

Base Build

22.5
19in
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
32mm
32mm
Tire Outer Diameter
686mm
686mm
Bike Length with Tires
1714mm
1731mm
Crank Length
170mm

Stack and Reach vs. Category Trend

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://www.vintage-trek.com/TrekBrochure1983Part1.htm, https://www.vintage-trek.com/images/trek/85TrekTouring.pdf