2023 Ironbridge 1779 Pinion 55
Build
700C/29 in × 40 mm
Insights
Very upright stack and reach vs trend of sport touring bikes
Design deviates from other sizes of Ironbridge 1779
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 608mm |
| Reach | 375.9mm |
| Stack to Reach Ratio | 1.62:1 |
| Seat Tube Length, C-T | 550mm |
| Top Tube Length, Effective/Horizontal HT Top | 555mm |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 87mm |
| Bottom Bracket Height | 264mm |
| Chainstay Length | 450mm |
| Chainstay Length Horizontal | 441.5mm |
| Front-Center | 598.8mm |
| Front-Center Horizontal | 592.5mm |
| Wheelbase | 1034mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 400mm |
| Trail | 66.7mm high |
| Mechanical Trail | 63.5mm |
| Wheel Flop | 19.6mm |
| Standover Height | 797mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 77.8mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 94mm |
Pinion Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1736mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Swept Back Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.ironbridge-bicycles.co.uk/bicycles/1779-pinion/