Compare: 2026 Argon 18 Equation Base XL 60-62 vs 2025 Serk Titanium A40 Base XXL

Insights

Somewhat aggressive stack and reach vs trend of endurance road bikes

Design deviates from other sizes of Argon 18 Equation

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

Design deviates from other sizes of Serk Titanium A40

Stack	623mm	638mm +15mm
Reach	407mm	406mm -1mm
Stack to Reach Ratio	1.53:1	1.57:1
Seat Tube Length, C-T	590mm	—
Seat Tube Length, Unknown	—	585mm
Top Tube Length, Effective/Horizontal HT Top	604mm	—
Top Tube Length, Effective/Horizontal Unknown	—	601mm
Top Tube Slope	5.9deg	7.8deg +1.9deg
Head Tube Angle	72.5deg	71.5deg -1deg
Seat Tube Angle	72.5deg	73deg +0.5deg
Head Tube Length	189mm	218mm +29mm
Bottom Bracket Drop	75mm	73mm -2mm
Bottom Bracket Height	264mm	278mm +14mm
Chainstay Length	420mm	420mm +0mm
Chainstay Length Horizontal	413.3mm	413.6mm +0.3mm
Front-Center	634.2mm	648.5mm +14.3mm
Front-Center Horizontal	629.8mm	644.4mm +14.6mm
Wheelbase	1043mm	1058mm +15mm
Fork Offset/Rake	47mm	47mm +0mm
Fork Length (Axle-To-Crown)	387mm	—
Trail	57.6mm mid/neutral	67.9mm +10.3mm high
Mechanical Trail	54.9mm	64.4mm +9.5mm
Wheel Flop	16.5mm	20.4mm +3.9mm
Standover Height	827mm	855mm +28mm
Tire to Pedal Spindle	125.2mm 170 mm cranks	127.5mm +2.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	94mm 170 mm cranks	108mm +14mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	40mm +12mm
Tire Outer Diameter	678mm	702mm +24mm
Bike Length with Tires	1721mm	1760mm +39mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Titanium
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Unknown