1989 Bridgestone Cycle Co. RB-1 Base
- Category
- Performance Road
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Steel
- Fork
- Steel
- Features
- Rim brake
Geometry
51cm | 53cm | 56cm | 59cm | 63cm | 48cm | |
Stack | 507.4mm | 526.7mm | 554.5mm | 580.6mm | 618.8mm | — |
Reach | 382.7mm | 377.4mm | 395.4mm | 392.8mm | 391.1mm | — |
Stack to Reach Ratio | 1.33:1 | 1.4:1 | 1.4:1 | 1.48:1 | 1.58:1 | — |
Seat Tube Length, C-T | 510mm | 530mm | 560mm | 590mm | 630mm | 480mm |
Seat Tube Length, C-C | 492mm | 512mm | 542mm | 572mm | 612mm | 462mm |
Top Tube Length, Effective/Horizontal Center | 525mm | 525mm | 555mm | 570mm | 580mm | — |
Top Tube Length, Actual C-C | 525mm | 525mm | 555mm | 570mm | 580mm | 510mm |
Top Tube Slope | 0deg | 0deg | 0deg | 0deg | 0deg | — |
Head Tube Angle | 72deg | 72deg | 73deg | 73.5deg | 73.5deg | 71.5deg |
Seat Tube Angle | 74.5deg | 74.5deg | 74deg | 73deg | 73deg | 74.5deg |
Bottom Bracket Drop | 75mm | 70mm | 70mm | 70mm | 65mm | 70mm |
Bottom Bracket Height | 261mm | 266mm | 266mm | 266mm | 271mm | 266mm |
Chainstay Length | 415mm | 415mm | 415mm | 415mm | 415mm | 415mm |
Chainstay Length Horizontal | 408.2mm | 409.1mm | 409.1mm | 409.1mm | 409.9mm | 409.1mm |
Front-Center | 582mm | 583mm | 595mm | 600mm | 606mm | 573mm |
Front-Center Horizontal | 578.8mm | 578mm | 591mm | 596mm | 602.1mm | 569mm |
Wheelbase | 987mm | 987mm | 1000mm | 1005mm | 1012mm | 978mm |
Fork Offset/Rake | 50mm | 50mm | 45mm | 45mm | 45mm | 50mm |
Trail | 56.6mm mid/neutral | 56.6mm mid/neutral | 55.7mm mid/neutral | 52.6mm mid/neutral | 52.6mm mid/neutral | 59.7mm mid/neutral |
Mechanical Trail | 53.8mm | 53.8mm | 53.2mm | 50.4mm | 50.4mm | 56.6mm |
Wheel Flop | 16.6mm | 16.6mm | 15.6mm | 14.3mm | 14.3mm | 18mm |
Standover Height | 754.4mm | 772.2mm | 800.1mm | 828mm | 871.2mm | 723.9mm |
Tire to Pedal Spindle | 76mm 170 mm cranks | 77mm 170 mm cranks | 89mm 170 mm cranks | 94mm 170 mm cranks | 100mm 170 mm cranks | 67mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 91mm 170 mm cranks | 96mm 170 mm cranks | 96mm 170 mm cranks | 96mm 170 mm cranks | 101mm 170 mm cranks | 96mm 170 mm cranks |
Base Build
51cm | 53cm | 56cm | 59cm | 63cm | 48cm | |
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 | 700C/29 in 622 mm BSD |
Tire Width | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm |
Tire Outer Diameter | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm |
Bike Length with Tires | 1659mm | 1659mm | 1672mm | 1677mm | 1684mm | 1650mm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Performance RoadSource:https://www.sheldonbrown.com/bridgestone/1989/index.htm