Compare: 2026 Factor Bikes OSTRO VAM Base 49 vs 2026 Giant Bicycles Propel Advanced Pro XS

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Factor Bikes OSTRO VAM

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Giant Bicycles Propel Advanced

Stack	503mm	517mm +14mm
Reach	370mm	376mm +6mm
Stack to Reach Ratio	1.36:1	1.38:1
Seat Tube Length, C-T	—	465mm
Seat Tube Length, Unknown	454mm	—
Top Tube Length, Effective/Horizontal Unknown	—	520mm
Top Tube Slope	7.6deg	7.8deg +0.2deg
Head Tube Angle	71.1deg	71deg -0.1deg
Seat Tube Angle	74.5deg	74.5deg +0deg
Head Tube Length	—	120mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	269mm	267mm -2mm
Chainstay Length	405mm	405mm +0mm
Chainstay Length Horizontal	398.6mm	398.6mm +0mm
Front-Center	575mm	581.9mm +6.9mm
Front-Center Horizontal	570.5mm	577.5mm +7mm
Wheelbase	969mm	976mm +7mm
Fork Offset/Rake	53mm	45mm -8mm
Trail	60.7mm mid/neutral	69.1mm +8.4mm high
Mechanical Trail	57.5mm	65.4mm +7.9mm
Wheel Flop	18.6mm	21.3mm +2.7mm
Standover Height	737mm	734mm -3mm
Tire to Pedal Spindle	64mm 170 mm cranks	72.9mm +8.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	97mm -2mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	28mm -2mm
Tire Outer Diameter	682mm	678mm -4mm
Bike Length with Tires	1651mm	1654mm +3mm
Crank Length	—	170mm
Handlebar Width	—	400mm
Stem Length	—	80mm
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-vam	https://www.giant-bicycles.com/md/propel-advanced-sl-team-frameset-2026
Brand	Factor Bikes	Giant Bicycles
Bike	2026 OSTRO VAM Base	2026 Propel Advanced Pro
Size	49	XS
Category	Performance Road	Performance Road