Compare: 2023 BXT BX-Road-145 Pro-145 58 vs 2027 Specialized Bicycles Tarmac SL9 S-Works 58

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of BXT BX-Road-145

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac SL9

Stack	582mm	591mm +9mm
Reach	396.1mm	402mm +5.9mm
Stack to Reach Ratio	1.47:1	1.47:1
Seat Tube Length, C-T	540mm	—
Seat Tube Length, C-TTT	—	515mm
Top Tube Length, Effective/Horizontal Center	574mm	577mm +3mm
Top Tube Slope	6.8deg	8deg +1.2deg
Head Tube Angle	73.8deg	73.5deg -0.3deg
Seat Tube Angle	73deg	73.5deg +0.5deg
Head Tube Length	171mm	184.3mm +13.3mm
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	595.8mm	606mm +10.2mm
Front-Center Horizontal	591.7mm	601.4mm +9.7mm
Wheelbase	995.7mm	1005mm +9.3mm
Fork Offset/Rake	45mm	44mm -1mm
Fork Length (Axle-To-Crown)	375mm	369mm -6mm
Trail	51.6mm mid/neutral	55.7mm +4.1mm mid/neutral
Mechanical Trail	49.6mm	53.4mm +3.8mm
Wheel Flop	13.8mm	15.2mm +1.4mm
Standover Height	—	807mm
Tire to Pedal Spindle	86.8mm 170 mm cranks	88mm +1.2mm 175 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	96mm -3mm 175 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	1673.7mm	1691mm +17.3mm
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