1997 Heron Bicycles Rally/Road Base 50
Build
650B/27.5 in × 28 mm
Insights
Very aggressive stack and reach vs trend of endurance road bikes
Design deviates from other sizes of Heron Bicycles Rally/Road
Stack and Reach vs. Category Trend
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Geometry
| Stack | 481mm |
| Reach | 385.8mm |
| Stack to Reach Ratio | 1.25:1 |
| Seat Tube Length, C-T | 500mm |
| 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 | 74deg |
| Bottom Bracket Drop | 45mm |
| Bottom Bracket Height | 275mm |
| Chainstay Length | 405mm |
| Chainstay Length Horizontal | 402.5mm |
| Fork Offset/Rake | 40mm |
| Trail | 61.9mm mid/neutral |
| Mechanical Trail | 58.9mm |
| Wheel Flop | 18.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | — |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 105mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 640mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:http://www.heronbicycles.com/geometry.html