Compare: 2025 Alvas DA Series DA54 L vs 2026 XDS X-LAB AD8 Base XL

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Alvas DA Series

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of XDS X-LAB AD8

Stack	560mm	575mm +15mm
Reach	393mm	405mm +12mm
Stack to Reach Ratio	1.42:1	1.42:1
Seat Tube Length, C-T	—	565mm
Seat Tube Length, C-TTT	533mm	—
Top Tube Length, Effective/Horizontal HT Top	559mm	—
Top Tube Length, Actual C-C	—	579mm
Top Tube Slope	—	3.5deg
Head Tube Angle	73.25deg	73deg -0.25deg
Seat Tube Angle	—	73deg
Effective Seat Tube Angle, Seat Tube Top	73.5deg	—
Head Tube Length	144mm	171mm +27mm
Bottom Bracket Drop	—	70mm
Bottom Bracket Height	—	269mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	—	404mm
Front-Center	—	607mm
Front-Center Horizontal	—	603mm
Wheelbase	988mm	1007mm +19mm
Fork Offset/Rake	42mm	43mm +1mm
Trail	57.3mm mid/neutral	58.7mm +1.4mm mid/neutral
Mechanical Trail	54.8mm	56.1mm +1.3mm
Wheel Flop	15.8mm	16.4mm +0.6mm
Standover Height	804mm	834mm +30mm
Tire to Pedal Spindle	— 170 mm cranks	98mm 170 mm cranks
Pedal Spindle to Ground Clearance	— 170 mm cranks	99mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	28mm +3mm
Tire Width Max	32mm	—
Tire Outer Diameter	672mm	678mm +6mm
Bike Length with Tires	1660mm	1685mm +25mm
Crank Length	170mm	170mm +0mm
Handlebar Width	400mm	400mm +0mm
Stem Length	100mm	120mm +20mm
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