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

Insights

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

Design deviates from other sizes of Argon 18 Anti Matter

Somewhat upright stack and reach vs trend of progressive gravel bikes

Design deviates from other sizes of XMCS Aero Gravel

Stack	607mm	608mm +1mm
Reach	409mm	417mm +8mm
Stack to Reach Ratio	1.48:1	1.46:1
Seat Tube Length, C-T	595mm	—
Seat Tube Length, Unknown	—	560mm
Top Tube Length, Effective/Horizontal HT Top	601mm	—
Top Tube Length, Effective/Horizontal Unknown	—	592mm
Top Tube Slope	3.9deg	7deg +3.1deg
Head Tube Angle	72.2deg	71.2deg -1deg
Seat Tube Angle	72.5deg	74deg +1.5deg
Head Tube Length	176mm	176mm +0mm
Bottom Bracket Drop	76mm	80mm +4mm
Bottom Bracket Height	280mm	288mm +8mm
Chainstay Length	425mm	425mm +0mm
Chainstay Length Horizontal	418.2mm	417.4mm -0.8mm
Front-Center	638.4mm	660mm +21.6mm
Front-Center Horizontal	633.9mm	655.6mm +21.7mm
Wheelbase	1052mm	1073mm +21mm
Fork Offset/Rake	51mm	55mm +4mm
Fork Length (Axle-To-Crown)	400mm	—
Fork Length, Unknown	—	400mm
Trail	60.7mm mid/neutral	67.2mm +6.5mm high
Mechanical Trail	57.8mm	63.6mm +5.8mm
Wheel Flop	17.7mm	20.5mm +2.8mm
Standover Height	866mm	—
Tire to Pedal Spindle	112.4mm 170 mm cranks	122mm +9.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	110mm 170 mm cranks	118mm +8mm 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	1764mm	1809mm +45mm
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