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

Insights

Average stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XMCS Aero Gravel

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

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