Compare: 2023 Onirii ONE Base 54 vs 2027 Specialized Bicycles Tarmac SL9 S-Works 54

Insights

Somewhat aggressive stack and reach vs trend of endurance road bikes

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac SL9

Stack	546mm	544mm -2mm
Reach	384mm	384mm +0mm
Stack to Reach Ratio	1.42:1	1.42:1
Seat Tube Length, C-T	480mm	—
Seat Tube Length, C-TTT	—	473mm
Top Tube Length, Effective/Horizontal Center	540mm	540mm +0mm
Top Tube Slope	9.3deg	7.7deg -1.6deg
Head Tube Angle	73deg	72.5deg -0.5deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	137mm	139.7mm +2.7mm
Bottom Bracket Drop	74mm	72mm -2mm
Bottom Bracket Height	265mm	271mm +6mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.3mm	403.6mm +0.3mm
Front-Center	584mm	587mm +3mm
Front-Center Horizontal	579.3mm	582.4mm +3.1mm
Wheelbase	982.6mm	986mm +3.4mm
Fork Offset/Rake	47mm	47mm +0mm
Fork Length (Axle-To-Crown)	—	369mm
Fork Length, Unknown	370mm	—
Trail	54.5mm mid/neutral	58.9mm +4.4mm mid/neutral
Mechanical Trail	52.1mm	56.1mm +4mm
Wheel Flop	15.2mm	16.9mm +1.7mm
Standover Height	—	767mm
Tire to Pedal Spindle	75mm 170 mm cranks	71.5mm -3.5mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	98.5mm +3.5mm 172.5 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	32mm +4mm
Tire Outer Diameter	678mm	686mm +8mm
Bike Length with Tires	1660.6mm	1672mm +11.4mm
Crank Length	—	172.5mm
Handlebar Width	—	420mm
Stem Length	—	100mm
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	Unknown	Disc