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

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