Compare: 2026 Argon 18 Anti Matter Base XS vs 2025 Serk Titanium A40 Base XS

Insights

Very aggressive stack and reach vs trend of all-road/gravel bikes

Design deviates from other sizes of Argon 18 Anti Matter

Average stack and reach vs trend of all-road/gravel bikes

Design deviates from other sizes of Serk Titanium A40

Stack	508mm	519mm +11mm
Reach	377mm	366mm -11mm
Stack to Reach Ratio	1.35:1	1.42:1
Seat Tube Length, C-T	425mm	—
Seat Tube Length, Unknown	—	435mm
Top Tube Length, Effective/Horizontal HT Top	520mm	—
Top Tube Length, Effective/Horizontal Unknown	—	505mm
Top Tube Slope	11.4deg	11.7deg +0.3deg
Head Tube Angle	70.7deg	71deg +0.3deg
Seat Tube Angle	74.5deg	75deg +0.5deg
Head Tube Length	76mm	90mm +14mm
Bottom Bracket Drop	80mm	77mm -3mm
Bottom Bracket Height	276mm	274mm -2mm
Chainstay Length	425mm	420mm -5mm
Chainstay Length Horizontal	417.4mm	412.9mm -4.5mm
Front-Center	592mm	573.3mm -18.7mm
Front-Center Horizontal	586.6mm	568.1mm -18.5mm
Wheelbase	1004mm	981mm -23mm
Fork Offset/Rake	51mm	47mm -4mm
Fork Length (Axle-To-Crown)	400mm	—
Trail	70.6mm high	71.2mm +0.6mm high
Mechanical Trail	66.7mm	67.3mm +0.6mm
Wheel Flop	22mm	21.9mm -0.1mm
Standover Height	714mm	722mm +8mm
Tire to Pedal Spindle	66mm 170 mm cranks	52.3mm -13.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	104mm -2mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	40mm -5mm
Tire Width Max	55mm	—
Tire Outer Diameter	712mm	702mm -10mm
Bike Length with Tires	1716mm	1683mm -33mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Titanium
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Unknown