Compare: 2026 XDS X-LAB RT9 Base XS vs 2026 XMCS Aero Racing Base XS

Insights

Somewhat upright stack and reach vs trend of performance road bikes

Design deviates from other sizes of XDS X-LAB RT9

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of XMCS Aero Racing

Stack	510mm	509mm -1mm
Reach	362mm	373mm +11mm
Stack to Reach Ratio	1.41:1	1.36:1
Seat Tube Length, C-T	430mm	—
Seat Tube Length, Unknown	—	450mm
Top Tube Length, Effective/Horizontal Center	—	505mm
Top Tube Length, Effective/Horizontal Unknown	498mm	—
Top Tube Slope	11.3deg	8.6deg -2.7deg
Head Tube Angle	70.5deg	71.25deg +0.75deg
Seat Tube Angle	75deg	75.5deg +0.5deg
Head Tube Length	110mm	97.4mm -12.6mm
Bottom Bracket Drop	74mm	74mm +0mm
Bottom Bracket Height	265mm	272mm +7mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.3mm	403.3mm +0mm
Front-Center	574mm	571mm -3mm
Front-Center Horizontal	569.2mm	565.7mm -3.5mm
Wheelbase	972.5mm	969mm -3.5mm
Fork Offset/Rake	49.8mm	47mm -2.8mm
Fork Length (On-Axis)	—	375mm
Trail	67.2mm high	67.8mm +0.6mm high
Mechanical Trail	63.4mm	64.2mm +0.8mm
Wheel Flop	21.2mm	20.6mm -0.6mm
Standover Height	704mm	726mm +22mm
Tire to Pedal Spindle	65mm 170 mm cranks	55mm -10mm 170 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	102mm +7mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	35mm +7mm
Tire Width Max	—	35mm
Tire Outer Diameter	678mm	692mm +14mm
Bike Length with Tires	1650.5mm	1661mm +10.5mm
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