1985 Bridgestone Cycle Co. 400 Base 21” (535mm)
Build
630mm BSD × 32 mm
Insights
Somewhat aggressive stack and reach vs trend of sport touring bikes
Design deviates from other sizes of Bridgestone Cycle Co. 400
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 532mm |
| Reach | 386.8mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 535mm |
| Seat Tube Length, C-C | 520mm |
| Top Tube Length, Effective/Horizontal Center | 545mm |
| Top Tube Length, Actual C-C | 545mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 73.5deg |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 277mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 419.2mm |
| Front-Center | 586.7mm |
| Front-Center Horizontal | 582.5mm |
| Wheelbase | 1001.7mm |
| Fork Offset/Rake | 50mm |
| Trail | 57mm mid/neutral |
| Mechanical Trail | 54.3mm |
| Wheel Flop | 16.3mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 69.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 107mm |
Base Build
| Wheel Size | 630mm BSD |
| Tire Width | 32mm |
| Tire Outer Diameter | 694mm |
| Bike Length with Tires | 1695.7mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:sheldonbrown.com