2025 Factor Bikes OSTRO GRAVEL Carbon
- Category
- Progressive Gravel
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Carbon/Composite
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
49 | 52 | 54 | 56 | 58 | 61 | |
Stack | 515mm | 535mm | 555mm | 580mm | 605mm | 625mm |
Reach | 377mm | 385mm | 394mm | 402mm | 412mm | 422mm |
Stack to Reach Ratio | 1.37:1 | 1.39:1 | 1.41:1 | 1.44:1 | 1.47:1 | 1.48:1 |
Seat Tube Length, C-T | 450mm | 468mm | 483mm | 500mm | 523mm | 545mm |
Top Tube Slope | 9.3deg | 9.4deg | 9.8deg | 10.5deg | 10.5deg | 10.1deg |
Head Tube Angle | 71.2deg | 71.3deg | 72.2deg | 72.3deg | 72.3deg | 72.3deg |
Seat Tube Angle | 74.5deg | 74deg | 74deg | 73.5deg | 73.5deg | 73.5deg |
Bottom Bracket Drop | 76mm | 76mm | 74mm | 74mm | 74mm | 74mm |
Bottom Bracket Height | 275mm | 275mm | 277mm | 277mm | 277mm | 277mm |
Chainstay Length | 420mm | 420mm | 420mm | 423mm | 425mm | 425mm |
Chainstay Length Horizontal | 413.1mm | 413.1mm | 413.4mm | 416.5mm | 418.5mm | 418.5mm |
Front-Center | 590.8mm | 604.7mm | 605.1mm | 617mm | 632.8mm | 654.7mm |
Front-Center Horizontal | 585.9mm | 599.9mm | 600.6mm | 612.5mm | 628.5mm | 650.5mm |
Wheelbase | 999mm | 1013mm | 1014mm | 1029mm | 1047mm | 1069mm |
Fork Offset/Rake | 56mm | 56mm | 50mm | 50mm | 50mm | 50mm |
Trail | 60.3mm mid/neutral | 59.7mm mid/neutral | 60.2mm mid/neutral | 59.5mm mid/neutral | 59.5mm mid/neutral | 59.5mm mid/neutral |
Mechanical Trail | 57.1mm | 56.5mm | 57.3mm | 56.7mm | 56.7mm | 56.7mm |
Wheel Flop | 18.4mm | 18.1mm | 17.5mm | 17.2mm | 17.2mm | 17.2mm |
Standover Height | 750mm | 767mm | 786mm | 802mm | 820mm | 847mm |
Tire to Pedal Spindle | 69.8mm 170 mm cranks | 83.7mm 170 mm cranks | 84.1mm 170 mm cranks | 96mm 170 mm cranks | 111.8mm 170 mm cranks | 133.7mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 105mm 170 mm cranks | 105mm 170 mm cranks | 107mm 170 mm cranks | 107mm 170 mm cranks | 107mm 170 mm cranks | 107mm 170 mm cranks |
Carbon Build
49 | 52 | 54 | 56 | 58 | 61 | |
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 | 40mm | 40mm | 40mm | 40mm | 40mm | 40mm |
Tire Width Max | 45mm | 45mm | 45mm | 45mm | 45mm | 45mm |
Tire Outer Diameter | 702mm | 702mm | 702mm | 702mm | 702mm | 702mm |
Bike Length with Tires | 1701mm | 1715mm | 1716mm | 1731mm | 1749mm | 1771mm |
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
Progressive GravelSource:https://factorbikes.com/bikes/ostro-gravel