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

Insights

Average stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XMCS Aero Gravel

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

Design deviates from other sizes of Argon 18 Anti Matter

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

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