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

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	521mm	535mm +14mm
Reach	378mm	370mm -8mm
Stack to Reach Ratio	1.38:1	1.45:1
Seat Tube Length, C-T	—	440mm
Seat Tube Length, C-TTT	473mm	—
Top Tube Length, Effective/Horizontal HT Top	533mm	—
Top Tube Length, Actual C-C	—	515mm
Top Tube Slope	—	12.8deg
Head Tube Angle	71.5deg	72deg +0.5deg
Seat Tube Angle	—	75deg
Effective Seat Tube Angle, Seat Tube Top	73.5deg	—
Head Tube Length	106mm	135mm +29mm
Bottom Bracket Drop	—	72mm
Bottom Bracket Height	—	271mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	—	403.6mm
Front-Center	—	577mm
Front-Center Horizontal	—	572.4mm
Wheelbase	976mm	976mm +0mm
Fork Offset/Rake	42mm	49.4mm +7.4mm
Trail	68.1mm high	59.5mm -8.6mm mid/neutral
Mechanical Trail	64.6mm	56.6mm -8mm
Wheel Flop	20.5mm	17.5mm -3mm
Standover Height	748mm	752mm +4mm
Tire to Pedal Spindle	— 170 mm cranks	69mm 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	1648mm	1662mm +14mm
Crank Length	170mm	165mm -5mm
Handlebar Width	380mm	360mm -20mm
Stem Length	80mm	100mm +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