2025 Factor Bikes OSTRO GRAVEL Carbon 56
Build
700C/29 in × 40 mm
Insights
Somewhat upright stack and reach vs trend of progressive gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 580mm |
| Reach | 402mm |
| Stack to Reach Ratio | 1.44:1 |
| Seat Tube Length, C-T | 500mm |
| Top Tube Slope | 10.5deg |
| Head Tube Angle | 72.3deg |
| Seat Tube Angle | 73.5deg |
| Bottom Bracket Drop | 74mm |
| Bottom Bracket Height | 277mm |
| Chainstay Length | 423mm |
| Chainstay Length Horizontal | 416.5mm |
| Front-Center | 617mm |
| Front-Center Horizontal | 612.5mm |
| Wheelbase | 1029mm |
| Fork Offset/Rake | 50mm |
| Trail | 59.5mm mid/neutral |
| Mechanical Trail | 56.7mm |
| Wheel Flop | 17.2mm |
| Standover Height | 802mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 96mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 107mm |
Carbon Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1731mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://factorbikes.com/bikes/ostro-gravel