Compare: 2025 Factor Bikes OSTRO GRAVEL Carbon 49 vs 2026 Mondince FM336 Base XS

Insights

Average stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of Factor Bikes OSTRO GRAVEL

Somewhat aggressive stack and reach vs trend of all-road/gravel bikes

Stack	515mm	535mm +20mm
Reach	377mm	375mm -2mm
Stack to Reach Ratio	1.37:1	1.43:1
Seat Tube Length, C-T	450mm	—
Seat Tube Length, Unknown	—	440mm
Top Tube Length, Effective/Horizontal Unknown	—	529mm
Top Tube Slope	9.3deg	12.7deg +3.4deg
Head Tube Angle	71.2deg	71deg -0.2deg
Seat Tube Angle	74.5deg	73.9deg -0.6deg
Head Tube Length	—	102mm
Bottom Bracket Drop	76mm	80mm +4mm
Bottom Bracket Height	275mm	271mm -4mm
Chainstay Length	420mm	426mm +6mm
Chainstay Length Horizontal	413.1mm	418.4mm +5.3mm
Front-Center	590.8mm	595mm +4.2mm
Front-Center Horizontal	585.9mm	589.6mm +3.7mm
Wheelbase	999mm	1008mm +9mm
Fork Offset/Rake	56mm	55mm -1mm
Fork Length, Unknown	—	397mm
Trail	60.3mm mid/neutral	62.7mm +2.4mm mid/neutral
Mechanical Trail	57.1mm	59.3mm +2.2mm
Wheel Flop	18.4mm	19.3mm +0.9mm
Standover Height	750mm	—
Tire to Pedal Spindle	69.8mm 170 mm cranks	74mm +4.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	105mm 170 mm cranks	101mm -4mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	40mm +0mm
Tire Outer Diameter	702mm	702mm +0mm
Bike Length with Tires	1701mm	1710mm +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://mondincecycle.com/product/2026-toray-t800-and-t1000-high-stiffness-storage-space-full-carbon-gravel-bike-frame-fm336
Brand	Factor Bikes	Mondince
Bike	2025 OSTRO GRAVEL Carbon	2026 FM336 Base
Size	49	XS
Category	Progressive Gravel	All-road/Gravel