Compare: 2026 Factor Bikes OSTRO VAM Base 61 vs 2027 Specialized Bicycles Tarmac SL9 S-Works 61

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 Specialized Bicycles Tarmac SL9

Stack	611mm	612mm +1mm
Reach	409mm	408mm -1mm
Stack to Reach Ratio	1.49:1	1.5:1
Seat Tube Length, C-TTT	—	545mm
Seat Tube Length, Unknown	554mm	—
Top Tube Length, Effective/Horizontal Center	—	595mm
Top Tube Slope	8deg	7.1deg -0.9deg
Head Tube Angle	73.3deg	74deg +0.7deg
Seat Tube Angle	73.5deg	73deg -0.5deg
Head Tube Length	—	204.4mm
Bottom Bracket Drop	70mm	72mm +2mm
Bottom Bracket Height	271mm	271mm +0mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	404mm	403.6mm -0.4mm
Front-Center	622mm	613mm -9mm
Front-Center Horizontal	618mm	608.4mm -9.6mm
Wheelbase	1022mm	1012mm -10mm
Fork Offset/Rake	43mm	44mm +1mm
Fork Length (Axle-To-Crown)	—	369mm
Trail	57.4mm mid/neutral	52.6mm -4.8mm mid/neutral
Mechanical Trail	55mm	50.5mm -4.5mm
Wheel Flop	15.8mm	13.9mm -1.9mm
Standover Height	840mm	833mm -7mm
Tire to Pedal Spindle	111mm 170 mm cranks	95mm -16mm 175 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	96mm -5mm 175 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	32mm +2mm
Tire Width Max	32mm	—
Tire Outer Diameter	682mm	686mm +4mm
Bike Length with Tires	1704mm	1698mm -6mm
Crank Length	—	175mm
Handlebar Width	—	440mm
Stem Length	—	110mm
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