Compare: 2026 Argon 18 Sum Pro L vs 2025 TanTan Cycling (Seraph) TT-X67 Base 58

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Argon 18 Sum

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X67

Stack	589mm	587mm -2mm
Reach	398mm	401mm +3mm
Stack to Reach Ratio	1.48:1	1.46:1
Seat Tube Length, Unknown	550mm	545mm -5mm
Top Tube Length, Effective/Horizontal Unknown	578mm	575mm -3mm
Top Tube Slope	6.4deg	6.6deg +0.2deg
Head Tube Angle	72.7deg	73.3deg +0.6deg
Seat Tube Angle	73deg	73.5deg +0.5deg
Head Tube Length	177mm	181mm +4mm
Bottom Bracket Drop	77mm	72mm -5mm
Bottom Bracket Height	259mm	267mm +8mm
Chainstay Length	410mm	405mm -5mm
Chainstay Length Horizontal	402.7mm	398.6mm -4.1mm
Front-Center	608.2mm	610mm +1.8mm
Front-Center Horizontal	603.3mm	605.5mm +2.2mm
Wheelbase	1006mm	1004mm -2mm
Fork Offset/Rake	44mm	48mm +4mm
Fork Length, Unknown	374mm	370mm -4mm
Trail	58.6mm mid/neutral	51.6mm -7mm mid/neutral
Mechanical Trail	55.9mm	49.4mm -6.5mm
Wheel Flop	16.6mm	14.2mm -2.4mm
Standover Height	—	830mm
Tire to Pedal Spindle	99.7mm 172.5 mm cranks	101mm +1.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	86.5mm 172.5 mm cranks	97mm +10.5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	28mm +3mm
Tire Width Max	32mm	32mm +0mm
Tire Outer Diameter	672mm	678mm +6mm
Bike Length with Tires	1678mm	1682mm +4mm
Crank Length	172.5mm	—
Handlebar Width	44cm	—
Stem Length	110mm	—
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