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

Insights

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

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

Design deviates from other sizes of Argon 18 Anti Matter

Stack	549.5mm	508mm -41.5mm
Reach	382mm	377mm -5mm
Stack to Reach Ratio	1.44:1	1.35:1
Seat Tube Length, C-T	460mm	425mm -35mm
Top Tube Length, Effective/Horizontal Center	540.4mm	—
Top Tube Length, Effective/Horizontal HT Top	—	520mm
Top Tube Slope	11.9deg	11.4deg -0.5deg
Head Tube Angle	71deg	70.7deg -0.3deg
Seat Tube Angle	73.9deg	74.5deg +0.6deg
Head Tube Length	80mm	76mm -4mm
Bottom Bracket Drop	80mm	80mm +0mm
Bottom Bracket Height	276mm	276mm +0mm
Chainstay Length	426mm	425mm -1mm
Chainstay Length Horizontal	418.4mm	417.4mm -1mm
Front-Center	604mm	592mm -12mm
Front-Center Horizontal	598.6mm	586.6mm -12mm
Wheelbase	1017mm	1004mm -13mm
Fork Offset/Rake	55mm	51mm -4mm
Fork Length (Axle-To-Crown)	—	400mm
Fork Length, Unknown	397mm	—
Trail	64.4mm mid/neutral	70.6mm +6.2mm high
Mechanical Trail	60.9mm	66.7mm +5.8mm
Wheel Flop	19.8mm	22mm +2.2mm
Standover Height	—	714mm
Tire to Pedal Spindle	88mm 160 mm cranks	66mm -22mm 170 mm cranks
Pedal Spindle to Ground Clearance	116mm 160 mm cranks	106mm -10mm 170 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	1729mm	1716mm -13mm
Crank Length	160mm	—
Handlebar Width	360mm	—
Stem Length	80mm	—
Suspension Type	Rigid, 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