Compare: 2021 VeloBuild 168 Base 58 vs 2025 SL8 Specialized Bicycles Tarmac sl8 Pro 175mm

Insights

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of VeloBuild 168

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Specialized Bicycles Tarmac sl8

Stack	581mm	591mm +10mm
Reach	405mm	402mm -3mm
Stack to Reach Ratio	1.43:1	1.47:1
Seat Tube Length, C-T	517mm	—
Seat Tube Length, Unknown	—	515mm
Top Tube Length, Effective/Horizontal Center	577mm	577mm +0mm
Top Tube Slope	8.8deg	10.1deg +1.3deg
Head Tube Angle	73.5deg	73.5deg +0deg
Seat Tube Angle	73.5deg	73.5deg +0deg
Head Tube Length	178mm	184mm +6mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	265mm	265mm +0mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.6mm	403.6mm +0mm
Front-Center	607mm	606mm -1mm
Front-Center Horizontal	602.7mm	602.4mm -0.3mm
Wheelbase	1006.3mm	1006mm -0.3mm
Fork Offset/Rake	45mm	44.7mm -0.3mm
Fork Length, Unknown	—	370mm
Trail	52.9mm mid/neutral	53.2mm +0.3mm mid/neutral
Mechanical Trail	50.7mm	51mm +0.3mm
Wheel Flop	14.4mm	14.5mm +0.1mm
Standover Height	—	808mm
Tire to Pedal Spindle	100mm 170 mm cranks	99mm -1mm 170 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	95mm +0mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	26mm	26mm +0mm
Tire Width Max	32mm	—
Tire Outer Diameter	674mm	674mm +0mm
Bike Length with Tires	1680.3mm	1680mm -0.3mm
Handlebar Width	—	420mm
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