Compare: 2023 BXT BX-Road-145 Pro-145 54 vs 2027 Specialized Bicycles Tarmac SL9 S-Works 54

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac SL9

Stack	541mm	544mm +3mm
Reach	384.8mm	384mm -0.8mm
Stack to Reach Ratio	1.41:1	1.42:1
Seat Tube Length, C-T	500mm	—
Seat Tube Length, C-TTT	—	473mm
Top Tube Length, Effective/Horizontal Center	543mm	540mm -3mm
Top Tube Slope	6.6deg	7.7deg +1.1deg
Head Tube Angle	73deg	72.5deg -0.5deg
Seat Tube Angle	73.7deg	74deg +0.3deg
Head Tube Length	131mm	139.7mm +8.7mm
Bottom Bracket Drop	70mm	72mm +2mm
Bottom Bracket Height	269mm	271mm +2mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	404mm	403.6mm -0.4mm
Front-Center	580mm	587mm +7mm
Front-Center Horizontal	575.8mm	582.4mm +6.6mm
Wheelbase	979.8mm	986mm +6.2mm
Fork Offset/Rake	45mm	47mm +2mm
Fork Length (Axle-To-Crown)	375mm	369mm -6mm
Trail	56.6mm mid/neutral	58.9mm +2.3mm mid/neutral
Mechanical Trail	54.1mm	56.1mm +2mm
Wheel Flop	15.8mm	16.9mm +1.1mm
Standover Height	—	767mm
Tire to Pedal Spindle	71mm 170 mm cranks	71.5mm +0.5mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	98.5mm -0.5mm 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	1657.8mm	1672mm +14.2mm
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	Disc	Disc