Compare: 2026 XDS X-LAB RT9 Base XS vs 2026 mentech arc sport Base 42

Insights

Somewhat upright stack and reach vs trend of performance road bikes

Design deviates from other sizes of XDS X-LAB RT9

Somewhat upright stack and reach vs trend of performance road bikes

Design deviates from other sizes of mentech arc sport

Stack	510mm	514.3mm +4.3mm
Reach	362mm	357.2mm -4.8mm
Stack to Reach Ratio	1.41:1	1.44:1
Seat Tube Length, C-T	430mm	—
Seat Tube Length, Unknown	—	420mm
Top Tube Length, Effective/Horizontal Center	—	495mm
Top Tube Length, Effective/Horizontal Unknown	498mm	—
Top Tube Slope	11.3deg	13.1deg +1.8deg
Head Tube Angle	70.5deg	70.8deg +0.3deg
Seat Tube Angle	75deg	75deg +0deg
Head Tube Length	110mm	110mm +0mm
Bottom Bracket Drop	74mm	72mm -2mm
Bottom Bracket Height	265mm	271mm +6mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.3mm	403.6mm +0.3mm
Front-Center	574mm	568.7mm -5.3mm
Front-Center Horizontal	569.2mm	564.2mm -5mm
Wheelbase	972.5mm	967.8mm -4.7mm
Fork Offset/Rake	49.8mm	50mm +0.2mm
Fork Length (On-Axis)	—	375mm
Trail	67.2mm high	66.5mm -0.7mm high
Mechanical Trail	63.4mm	62.8mm -0.6mm
Wheel Flop	21.2mm	20.7mm -0.5mm
Standover Height	704mm	724.3mm +20.3mm
Tire to Pedal Spindle	65mm 170 mm cranks	55.7mm -9.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	101mm +6mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	32mm +4mm
Tire Width Max	—	35mm
Tire Outer Diameter	678mm	686mm +8mm
Bike Length with Tires	1650.5mm	1653.8mm +3.3mm
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