1989 Trek Bikes 4 Series 420 24"

Build

700C/29 in × 28 mm

Insights

Somewhat aggressive stack and reach vs trend of sport touring bikes
Design deviates from other sizes of Trek Bikes 4 Series

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
591.2mm
Reach
405.6mm
Stack to Reach Ratio
1.46:1
Seat Tube Length, C-T
616mm
Top Tube Length, Effective/Horizontal Center
581mm
Top Tube Length, Actual C-C
581mm
Top Tube Slope
0deg
Head Tube Angle
73deg
Seat Tube Angle
73.5deg
Bottom Bracket Drop
72mm
Bottom Bracket Height
267mm
Chainstay Length
430mm
Chainstay Length Horizontal
423.9mm
Front-Center
616.3mm
Front-Center Horizontal
612.1mm
Wheelbase
1036mm
Fork Offset/Rake
45mm
Trail
56.6mm
mid/​neutral
Mechanical Trail
54.1mm
Wheel Flop
15.8mm
Standover Height
812.8mm
Tire to Pedal Spindle Distance
With 170 mm cranks
107.3mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
97mm

420 Build

Wheel Size
700C, 29 inch (622mm BSD)
Tire Width
28mm
Tire Outer Diameter
678mm
Bike Length with Tires
1714mm
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Rim
Source:http://vintage-trek.com/images/trek/Trek89Brochure.pdf