Compare: 2025 TanTan Cycling (Seraph) TT-X67 Base 56 vs 2026 Argon 18 Sum Pro M

Insights

Average stack and reach vs trend of performance road bikes

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

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Argon 18 Sum

Stack	565mm	564mm -1mm
Reach	392mm	390mm -2mm
Stack to Reach Ratio	1.44:1	1.45:1
Seat Tube Length, Unknown	525mm	505mm -20mm
Top Tube Length, Effective/Horizontal Unknown	559mm	557mm -2mm
Top Tube Slope	6.5deg	8.5deg +2deg
Head Tube Angle	73deg	72.7deg -0.3deg
Seat Tube Angle	73.5deg	73.5deg +0deg
Head Tube Length	159mm	151mm -8mm
Bottom Bracket Drop	72mm	77mm +5mm
Bottom Bracket Height	267mm	259mm -8mm
Chainstay Length	405mm	410mm +5mm
Chainstay Length Horizontal	398.6mm	402.7mm +4.1mm
Front-Center	598mm	592.3mm -5.7mm
Front-Center Horizontal	592.5mm	587.3mm -5.2mm
Wheelbase	991mm	990mm -1mm
Fork Offset/Rake	48mm	44mm -4mm
Fork Length, Unknown	370mm	374mm +4mm
Trail	53.5mm mid/neutral	58.6mm +5.1mm mid/neutral
Mechanical Trail	51.1mm	55.9mm +4.8mm
Wheel Flop	14.9mm	16.6mm +1.7mm
Standover Height	810mm	—
Tire to Pedal Spindle	89mm 170 mm cranks	83.8mm -5.2mm 172.5 mm cranks
Pedal Spindle to Ground Clearance	97mm 170 mm cranks	86.5mm -10.5mm 172.5 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	25mm -3mm
Tire Width Max	32mm	32mm +0mm
Tire Outer Diameter	678mm	672mm -6mm
Bike Length with Tires	1669mm	1662mm -7mm
Crank Length	—	172.5mm
Handlebar Width	—	44cm
Stem Length	—	100mm
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