1977 Trek Bikes 900 Base
- Category
- Performance Road
- Design
- Flat Bar, Rigid, non-suspension corrected
- Frame
- Steel
- Fork
- Steel
- Features
- Rim brake
Geometry
49 | 52 | 56 | 60 | 64 | |
Seat Tube Length, C-C | 490mm | 520mm | 560mm | 600mm | 640mm |
Top Tube Length, Actual C-C | 530mm | 540mm | 560mm | 560mm | 600mm |
Head Tube Angle | 71deg | 71.5deg | 73deg | 73deg | 73deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg | 73deg |
Bottom Bracket Drop | 60mm | 60mm | 60mm | 60mm | 60mm |
Bottom Bracket Height | 289.1mm | 289.1mm | 289.1mm | 289.1mm | 289.1mm |
Chainstay Length | 420mm | 420mm | 420mm | 420mm | 420mm |
Chainstay Length Horizontal | 415.7mm | 415.7mm | 415.7mm | 415.7mm | 415.7mm |
Front-Center | 608.3mm | 615.2mm | 622.2mm | 642.1mm | 662mm |
Front-Center Horizontal | 605.3mm | 612.3mm | 619.3mm | 639.3mm | 659.3mm |
Wheelbase | 1021mm | 1028mm | 1035mm | 1055mm | 1075mm |
Fork Offset/Rake | 45mm | 45mm | 45mm | 45mm | 45mm |
Fork Length (On-Axis) | 370mm | 370mm | 370mm | 370mm | 370mm |
Trail | 72.6mm high | 69.4mm high | 59.7mm mid/neutral | 59.7mm mid/neutral | 59.7mm mid/neutral |
Mechanical Trail | 68.7mm | 65.8mm | 57.1mm | 57.1mm | 57.1mm |
Wheel Flop | 22.4mm | 20.9mm | 16.7mm | 16.7mm | 16.7mm |
Tire to Pedal Spindle | 89.2mm 170 mm cranks | 96.1mm 170 mm cranks | 103.1mm 170 mm cranks | 123mm 170 mm cranks | 142.9mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 119.1mm 170 mm cranks | 119.1mm 170 mm cranks | 119.1mm 170 mm cranks | 119.1mm 170 mm cranks | 119.1mm 170 mm cranks |
Base Build
49 | 52 | 56 | 60 | 64 | |
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 |
Tire Width | 1.5in | 1.5in | 1.5in | 1.5in | 1.5in |
Tire Outer Diameter | 698.2mm | 698.2mm | 698.2mm | 698.2mm | 698.2mm |
Bike Length with Tires | 1719.2mm | 1726.2mm | 1733.2mm | 1753.2mm | 1773.2mm |
Source:http://www.vintage-trek.com/images/trek/TrekMidwest/TrekMidwest.pdf