Compare: 2025 Serk Titanium A40 Base L vs 2026 Argon 18 Anti Matter Base L

Insights

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

Design deviates from other sizes of Serk Titanium A40

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

Design deviates from other sizes of Argon 18 Anti Matter

Stack	590mm	580mm -10mm
Reach	390mm	400mm +10mm
Stack to Reach Ratio	1.51:1	1.45:1
Seat Tube Length, C-T	—	550mm
Seat Tube Length, Unknown	535mm	—
Top Tube Length, Effective/Horizontal HT Top	—	578mm
Top Tube Length, Effective/Horizontal Unknown	565mm	—
Top Tube Slope	8.1deg	5.5deg -2.6deg
Head Tube Angle	71.5deg	71.1deg -0.4deg
Seat Tube Angle	73.5deg	73deg -0.5deg
Head Tube Length	168mm	150mm -18mm
Bottom Bracket Drop	73mm	76mm +3mm
Bottom Bracket Height	278mm	280mm +2mm
Chainstay Length	420mm	425mm +5mm
Chainstay Length Horizontal	413.6mm	418.2mm +4.6mm
Front-Center	616.7mm	625.5mm +8.8mm
Front-Center Horizontal	612.4mm	620.9mm +8.5mm
Wheelbase	1026mm	1039mm +13mm
Fork Offset/Rake	47mm	51mm +4mm
Fork Length (Axle-To-Crown)	—	400mm
Trail	67.9mm high	68mm +0.1mm high
Mechanical Trail	64.4mm	64.3mm -0.1mm
Wheel Flop	20.4mm	20.8mm +0.4mm
Standover Height	808mm	828mm +20mm
Tire to Pedal Spindle	95.7mm 170 mm cranks	99.5mm +3.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	108mm 170 mm cranks	110mm +2mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	40mm	45mm +5mm
Tire Width Max	—	55mm
Tire Outer Diameter	702mm	712mm +10mm
Bike Length with Tires	1728mm	1751mm +23mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Titanium	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Unknown	Disc