Compare: 2026 Argon 18 Anti Matter Base XS vs 2026 TanTan Cycling (Seraph) Gr209 Base 46

Insights

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

Design deviates from other sizes of Argon 18 Anti Matter

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

Stack	508mm	549.5mm +41.5mm
Reach	377mm	382mm +5mm
Stack to Reach Ratio	1.35:1	1.44:1
Seat Tube Length, C-T	425mm	460mm +35mm
Top Tube Length, Effective/Horizontal Center	—	540.4mm
Top Tube Length, Effective/Horizontal HT Top	520mm	—
Top Tube Slope	11.4deg	11.9deg +0.5deg
Head Tube Angle	70.7deg	71deg +0.3deg
Seat Tube Angle	74.5deg	73.9deg -0.6deg
Head Tube Length	76mm	80mm +4mm
Bottom Bracket Drop	80mm	80mm +0mm
Bottom Bracket Height	276mm	276mm +0mm
Chainstay Length	425mm	426mm +1mm
Chainstay Length Horizontal	417.4mm	418.4mm +1mm
Front-Center	592mm	604mm +12mm
Front-Center Horizontal	586.6mm	598.6mm +12mm
Wheelbase	1004mm	1017mm +13mm
Fork Offset/Rake	51mm	55mm +4mm
Fork Length (Axle-To-Crown)	400mm	—
Fork Length, Unknown	—	397mm
Trail	70.6mm high	64.4mm -6.2mm mid/neutral
Mechanical Trail	66.7mm	60.9mm -5.8mm
Wheel Flop	22mm	19.8mm -2.2mm
Standover Height	714mm	—
Tire to Pedal Spindle	66mm 170 mm cranks	88mm +22mm 160 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	116mm +10mm 160 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	45mm +0mm
Tire Width Max	55mm	—
Tire Outer Diameter	712mm	712mm +0mm
Bike Length with Tires	1716mm	1729mm +13mm
Crank Length	—	160mm
Handlebar Width	—	360mm
Stem Length	—	80mm
Suspension Type	Rigid, non-suspension corrected	Rigid, suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc