Compare: 2026 Argon 18 Anti Matter Base XS vs 2026 XMCS Aero Gravel Base S

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 progressive gravel bikes

Design deviates from other sizes of XMCS Aero Gravel

Stack	508mm	548mm +40mm
Reach	377mm	386mm +9mm
Stack to Reach Ratio	1.35:1	1.42:1
Seat Tube Length, C-T	425mm	—
Seat Tube Length, Unknown	—	455mm
Top Tube Length, Effective/Horizontal HT Top	520mm	—
Top Tube Length, Effective/Horizontal Unknown	—	533mm
Top Tube Slope	11.4deg	12.2deg +0.8deg
Head Tube Angle	70.7deg	71deg +0.3deg
Seat Tube Angle	74.5deg	75deg +0.5deg
Head Tube Length	76mm	114mm +38mm
Bottom Bracket Drop	80mm	80mm +0mm
Bottom Bracket Height	276mm	288mm +12mm
Chainstay Length	425mm	425mm +0mm
Chainstay Length Horizontal	417.4mm	417.4mm +0mm
Front-Center	592mm	611mm +19mm
Front-Center Horizontal	586.6mm	605.6mm +19mm
Wheelbase	1004mm	1023mm +19mm
Fork Offset/Rake	51mm	55mm +4mm
Fork Length (Axle-To-Crown)	400mm	—
Fork Length, Unknown	—	400mm
Trail	70.6mm high	68.5mm -2.1mm high
Mechanical Trail	66.7mm	64.8mm -1.9mm
Wheel Flop	22mm	21.1mm -0.9mm
Standover Height	714mm	—
Tire to Pedal Spindle	66mm 170 mm cranks	73mm +7mm 170 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	118mm +12mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	57mm +12mm
Tire Width Max	55mm	57mm +2mm
Tire Outer Diameter	712mm	736mm +24mm
Bike Length with Tires	1716mm	1759mm +43mm
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