Compare: 2021 VeloBuild 168 Base 49 vs 2025 SL8 Specialized Bicycles Tarmac sl8 Pro 165mm

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	503mm	514mm +11mm
Reach	380mm	375mm -5mm
Stack to Reach Ratio	1.32:1	1.37:1
Seat Tube Length, C-T	447mm	—
Seat Tube Length, Unknown	—	445mm
Top Tube Length, Effective/Horizontal Center	510mm	509mm -1mm
Top Tube Slope	8.1deg	9.7deg +1.6deg
Head Tube Angle	71.75deg	71.75deg +0deg
Seat Tube Angle	75.5deg	75.5deg +0deg
Head Tube Length	102mm	109mm +7mm
Bottom Bracket Drop	72mm	74mm +2mm
Bottom Bracket Height	265mm	263mm -2mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.6mm	403.3mm -0.3mm
Front-Center	574mm	574mm +0mm
Front-Center Horizontal	569.5mm	569.7mm +0.2mm
Wheelbase	973.1mm	973mm -0.1mm
Fork Offset/Rake	45mm	47.2mm +2.2mm
Fork Length, Unknown	—	370mm
Trail	63.7mm mid/neutral	61.5mm -2.2mm mid/neutral
Mechanical Trail	60.5mm	58.4mm -2.1mm
Wheel Flop	19mm	18.3mm -0.7mm
Standover Height	—	735mm
Tire to Pedal Spindle	67mm 170 mm cranks	67mm +0mm 170 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	93mm -2mm 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	1647.1mm	1647mm -0.1mm
Handlebar Width	—	380mm
Stem Length	—	75mm
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