Compare: 2021 TWITTER Bikes R10 Disc Base S-48 vs 2027 Specialized Bicycles Tarmac SL9 S-Works 52

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac SL9

Stack	521mm	527mm +6mm
Reach	375mm	380mm +5mm
Stack to Reach Ratio	1.39:1	1.39:1
Seat Tube Length, C-T	480mm	—
Seat Tube Length, C-TTT	—	456mm
Top Tube Length, Effective/Horizontal Center	—	531mm
Top Tube Length, Effective/Horizontal HT Top	520mm	—
Top Tube Slope	6.6deg	7.7deg +1.1deg
Head Tube Angle	72deg	72.5deg +0.5deg
Seat Tube Angle	74.5deg	74deg -0.5deg
Head Tube Length	115mm	119.8mm +4.8mm
Bottom Bracket Drop	72mm	74mm +2mm
Bottom Bracket Height	264mm	269mm +5mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.6mm	403.3mm -0.3mm
Front-Center	584mm	577mm -7mm
Front-Center Horizontal	579.5mm	571.7mm -7.8mm
Wheelbase	983.2mm	975mm -8.2mm
Fork Offset/Rake	55mm	47mm -8mm
Fork Length (Axle-To-Crown)	—	369mm
Trail	51.3mm mid/neutral	58.9mm +7.6mm mid/neutral
Mechanical Trail	48.8mm	56.1mm +7.3mm
Wheel Flop	15.1mm	16.9mm +1.8mm
Standover Height	—	745mm
Tire to Pedal Spindle	78mm 170 mm cranks	64mm -14mm 170 mm cranks
Pedal Spindle to Ground Clearance	94mm 170 mm cranks	99mm +5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	32mm +7mm
Tire Width Max	28mm	—
Tire Outer Diameter	672mm	686mm +14mm
Bike Length with Tires	1655.2mm	1661mm +5.8mm
Crank Length	—	170mm
Handlebar Width	—	420mm
Stem Length	—	90mm
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