Compare: 2025 Alvas DA Series DA54 XS vs 2026 XDS X-LAB RS7 Base XS

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Alvas DA Series

Somewhat upright stack and reach vs trend of performance road bikes

Design deviates from other sizes of XDS X-LAB RS7

Stack	498mm	526mm +28mm
Reach	372mm	360mm -12mm
Stack to Reach Ratio	1.34:1	1.46:1
Seat Tube Length, C-T	—	420mm
Seat Tube Length, C-TTT	443mm	—
Top Tube Length, Effective/Horizontal HT Top	519mm	—
Top Tube Length, Actual C-C	—	500mm
Top Tube Slope	—	14.4deg
Head Tube Angle	70.5deg	70deg -0.5deg
Seat Tube Angle	—	75deg
Effective Seat Tube Angle, Seat Tube Top	73.5deg	—
Head Tube Length	86mm	130mm +44mm
Bottom Bracket Drop	—	72mm
Bottom Bracket Height	—	271mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	—	403.6mm
Front-Center	—	574mm
Front-Center Horizontal	—	569.4mm
Wheelbase	971mm	973mm +2mm
Fork Offset/Rake	42mm	41.5mm -0.5mm
Trail	74.4mm high	80.7mm +6.3mm very high
Mechanical Trail	70.2mm	75.9mm +5.7mm
Wheel Flop	23.4mm	25.9mm +2.5mm
Standover Height	717mm	737mm +20mm
Tire to Pedal Spindle	— 170 mm cranks	66mm 165 mm cranks
Pedal Spindle to Ground Clearance	— 170 mm cranks	106mm 165 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	32mm +7mm
Tire Width Max	32mm	—
Tire Outer Diameter	672mm	686mm +14mm
Bike Length with Tires	1643mm	1659mm +16mm
Crank Length	170mm	165mm -5mm
Handlebar Width	380mm	360mm -20mm
Stem Length	80mm	90mm +10mm
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