1989 Trek Bikes 400 series Base 18"
Build
700C/29 in × 25 mm
Insights
Very aggressive stack and reach vs trend of endurance road bikes
Design deviates from other sizes of Trek Bikes 400 series
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 440.5mm |
| Reach | 391.6mm |
| Stack to Reach Ratio | 1.12:1 |
| Seat Tube Length, C-T | 459mm |
| Top Tube Length, Effective/Horizontal Center | 523mm |
| Top Tube Length, Actual C-C | 523mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 73.5deg |
| Chainstay Length | 410mm |
| Wheelbase | 971mm |
| Trail | — — |
| Tire to Pedal Spindle Distance With 170 mm cranks | — |
| Pedal Spindle to Ground Clearance With 170 mm cranks | — |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 25mm |
| Tire Outer Diameter | 672mm |
| Bike Length with Tires | 1643mm |
| 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/89Brochure/Trek89_Chrom.jpg