1989 Bridgestone Cycle Co. RB-1 Base 51cm
Build
700C/29 in × 25 mm
Insights
Somewhat aggressive stack and reach vs trend of performance road bikes
Design deviates from other sizes of Bridgestone Cycle Co. RB-1
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 507.4mm |
| Reach | 382.7mm |
| Stack to Reach Ratio | 1.33:1 |
| Seat Tube Length, C-T | 510mm |
| Seat Tube Length, C-C | 492mm |
| Top Tube Length, Effective/Horizontal Center | 525mm |
| Top Tube Length, Actual C-C | 525mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 74.5deg |
| Bottom Bracket Drop | 75mm |
| Bottom Bracket Height | 261mm |
| Chainstay Length | 415mm |
| Chainstay Length Horizontal | 408.2mm |
| Front-Center | 582mm |
| Front-Center Horizontal | 578.8mm |
| Wheelbase | 987mm |
| Fork Offset/Rake | 50mm |
| Trail | 56.6mm mid/neutral |
| Mechanical Trail | 53.8mm |
| Wheel Flop | 16.6mm |
| Standover Height | 754.4mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 76mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 91mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 25mm |
| Tire Outer Diameter | 672mm |
| Bike Length with Tires | 1659mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:https://www.sheldonbrown.com/bridgestone/1989/index.htm