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

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	531mm	548mm +17mm
Reach	384mm	386mm +2mm
Stack to Reach Ratio	1.38:1	1.42:1
Seat Tube Length, C-T	460mm	—
Seat Tube Length, Unknown	—	455mm
Top Tube Length, Effective/Horizontal HT Top	538mm	—
Top Tube Length, Effective/Horizontal Unknown	—	533mm
Top Tube Slope	9.9deg	12.2deg +2.3deg
Head Tube Angle	71.1deg	71deg -0.1deg
Seat Tube Angle	74deg	75deg +1deg
Head Tube Length	101mm	114mm +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	603.3mm	611mm +7.7mm
Front-Center Horizontal	598.2mm	605.6mm +7.4mm
Wheelbase	1016mm	1023mm +7mm
Fork Offset/Rake	51mm	55mm +4mm
Fork Length (Axle-To-Crown)	400mm	—
Fork Length, Unknown	—	400mm
Trail	68mm high	68.5mm +0.5mm high
Mechanical Trail	64.3mm	64.8mm +0.5mm
Wheel Flop	20.8mm	21.1mm +0.3mm
Standover Height	749mm	—
Tire to Pedal Spindle	77.3mm 170 mm cranks	73mm -4.3mm 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	1728mm	1759mm +31mm
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