Compare: 2025 Factor Bikes OSTRO GRAVEL Carbon 61 vs 2023 Airwolf YFR066 Base XL - 58

Insights

Somewhat upright stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of Factor Bikes OSTRO GRAVEL

Average stack and reach vs trend of endurance road bikes

Design deviates from other sizes of Airwolf YFR066

Stack	625mm	614mm -11mm
Reach	422mm	398mm -24mm
Stack to Reach Ratio	1.48:1	1.54:1
Seat Tube Length, C-T	545mm	—
Seat Tube Length, Unknown	—	550mm
Top Tube Slope	10.1deg	8.9deg -1.2deg
Head Tube Angle	72.3deg	73.3deg +1deg
Seat Tube Angle	73.5deg	73.1deg -0.4deg
Head Tube Length	—	185mm
Bottom Bracket Drop	74mm	70mm -4mm
Bottom Bracket Height	277mm	266mm -11mm
Chainstay Length	425mm	420mm -5mm
Chainstay Length Horizontal	418.5mm	414.1mm -4.4mm
Front-Center	654.7mm	613mm -41.7mm
Front-Center Horizontal	650.5mm	609mm -41.5mm
Wheelbase	1069mm	1023.1mm -45.9mm
Fork Offset/Rake	50mm	45mm -5mm
Trail	59.5mm mid/neutral	53.8mm -5.7mm mid/neutral
Mechanical Trail	56.7mm	51.6mm -5.1mm
Wheel Flop	17.2mm	14.8mm -2.4mm
Standover Height	847mm	—
Tire to Pedal Spindle	133.7mm 170 mm cranks	107mm -26.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	107mm 170 mm cranks	96mm -11mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	25mm -15mm
Tire Outer Diameter	702mm	672mm -30mm
Bike Length with Tires	1771mm	1695.1mm -75.9mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://factorbikes.com/bikes/ostro-gravel	https://www.aliexpress.com/item/1005004256426343.html?spm=a2g0o.store_pc_home.promoteWysiwyg_503471845.1005004256426343
Brand	Factor Bikes	Airwolf
Bike	2025 OSTRO GRAVEL Carbon	2023 YFR066 Base
Size	61	XL - 58
Category	Progressive Gravel	Endurance Road