1997 Heron Bicycles Rally/Road Base 54
Build
700C/29 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 | 517.1mm |
| Reach | 391.9mm |
| Stack to Reach Ratio | 1.32:1 |
| Seat Tube Length, C-T | 540mm |
| Top Tube Length, Effective/Horizontal Center | 550mm |
| Top Tube Length, Actual C-C | 550mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 73deg |
| Seat Tube Angle | 73deg |
| Bottom Bracket Drop | 75mm |
| Bottom Bracket Height | 264mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 418.3mm |
| Fork Offset/Rake | 45mm |
| Trail | 56.6mm mid/neutral |
| Mechanical Trail | 54.1mm |
| Wheel Flop | 15.8mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | — |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 94mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 678mm |
| 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