Compare: 2026 Factor Bikes OSTRO VAM Base 45 vs 2024 Bigrock Aero Base 46

Insights

Somewhat upright 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 Bigrock Aero

Stack	502mm	507.3mm +5.3mm
Reach	360mm	369mm +9mm
Stack to Reach Ratio	1.39:1	1.37:1
Seat Tube Length, C-TTT	—	430mm
Seat Tube Length, Unknown	432mm	—
Top Tube Length, Effective/Horizontal HT Top	—	510.6mm
Top Tube Slope	10.3deg	8.6deg -1.7deg
Head Tube Angle	71.1deg	70.5deg -0.6deg
Seat Tube Angle	73.5deg	74.4deg +0.9deg
Head Tube Length	—	104mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	269mm	267mm -2mm
Chainstay Length	405mm	406mm +1mm
Chainstay Length Horizontal	398.6mm	399.6mm +1mm
Front-Center	576mm	573.3mm -2.7mm
Front-Center Horizontal	571.5mm	568.8mm -2.7mm
Wheelbase	970mm	968.3mm -1.7mm
Fork Offset/Rake	57mm	43mm -14mm
Fork Length, Unknown	—	373mm
Trail	56.5mm mid/neutral	74.4mm +17.9mm high
Mechanical Trail	53.5mm	70.2mm +16.7mm
Wheel Flop	17.3mm	23.4mm +6.1mm
Standover Height	726mm	—
Tire to Pedal Spindle	65mm 170 mm cranks	64.3mm -0.7mm 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	1652mm	1646.3mm -5.7mm
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.pandapodium.cc/product/bigrock-aero-carbon-road-bike-frameset/
Brand	Factor Bikes	Bigrock
Bike	2026 OSTRO VAM Base	2024 Aero Base
Size	45	46
Category	Performance Road	Performance Road