Compare: 2025 TWITTER Bikes R10 Disc ET 50 vs 2027 Specialized Bicycles Tarmac SL9 S-Works 54

Insights

Average stack and reach vs trend of sport touring bikes

Bar type unusual for category

This: Aero Bar
Category: Drop Bar

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac SL9

Stack	542mm	544mm +2mm
Reach	380mm	384mm +4mm
Stack to Reach Ratio	1.43:1	1.42:1
Seat Tube Length, C-TTT	—	473mm
Seat Tube Length, Unknown	500mm	—
Top Tube Length, Effective/Horizontal Center	—	540mm
Top Tube Length, Effective/Horizontal Unknown	535mm	—
Top Tube Slope	6.8deg	7.7deg +0.9deg
Head Tube Angle	72.5deg	72.5deg +0deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	135mm	139.7mm +4.7mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	267mm	271mm +4mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.6mm	403.6mm +0mm
Front-Center	590.3mm	587mm -3.3mm
Front-Center Horizontal	585.9mm	582.4mm -3.5mm
Wheelbase	989.5mm	986mm -3.5mm
Fork Offset/Rake	55mm	47mm -8mm
Fork Length (Axle-To-Crown)	—	369mm
Trail	49.2mm mid/neutral	58.9mm +9.7mm mid/neutral
Mechanical Trail	46.9mm	56.1mm +9.2mm
Wheel Flop	14.1mm	16.9mm +2.8mm
Standover Height	—	767mm
Tire to Pedal Spindle	81.3mm 170 mm cranks	71.5mm -9.8mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	97mm 170 mm cranks	98.5mm +1.5mm 172.5 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	32mm +4mm
Tire Width Max	32mm	—
Tire Outer Diameter	678mm	686mm +8mm
Bike Length with Tires	1667.5mm	1672mm +4.5mm
Crank Length	170mm	172.5mm +2.5mm
Handlebar Width	420mm	420mm +0mm
Stem Length	—	100mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Aero Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc