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

Insights

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

Average stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XMCS Aero Gravel

Stack	555mm	568mm +13mm
Reach	392mm	395mm +3mm
Stack to Reach Ratio	1.42:1	1.44:1
Seat Tube Length, C-T	505mm	—
Seat Tube Length, Unknown	—	490mm
Top Tube Length, Effective/Horizontal HT Top	558mm	—
Top Tube Length, Effective/Horizontal Unknown	—	558mm
Top Tube Slope	7.5deg	10.4deg +2.9deg
Head Tube Angle	71.1deg	71.2deg +0.1deg
Seat Tube Angle	73.5deg	74deg +0.5deg
Head Tube Length	122mm	135mm +13mm
Bottom Bracket Drop	78mm	80mm +2mm
Bottom Bracket Height	278mm	288mm +10mm
Chainstay Length	425mm	425mm +0mm
Chainstay Length Horizontal	417.8mm	417.4mm -0.4mm
Front-Center	609.2mm	623mm +13.8mm
Front-Center Horizontal	604.2mm	619.6mm +15.4mm
Wheelbase	1022mm	1037mm +15mm
Fork Offset/Rake	51mm	55mm +4mm
Fork Length (Axle-To-Crown)	400mm	—
Fork Length, Unknown	—	400mm
Trail	68mm high	67.2mm -0.8mm high
Mechanical Trail	64.3mm	63.6mm -0.7mm
Wheel Flop	20.8mm	20.5mm -0.3mm
Standover Height	788mm	—
Tire to Pedal Spindle	83.2mm 170 mm cranks	85mm +1.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	108mm 170 mm cranks	118mm +10mm 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	1734mm	1773mm +39mm
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