Compare: 2025 ASSISTING FORCE AF01 Base XS vs 2026 Argon 18 Dark Matter 3D High Stack XXS

Insights

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

Design deviates from other sizes of ASSISTING FORCE AF01

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

Design deviates from other sizes of Argon 18 Dark Matter

Stack	535mm	543mm +8mm
Reach	375mm	361mm -14mm
Stack to Reach Ratio	1.43:1	1.5:1
Seat Tube Length, C-T	—	420mm
Seat Tube Length, Unknown	379mm	—
Top Tube Length, Effective/Horizontal HT Top	—	507mm
Top Tube Length, Effective/Horizontal Unknown	529mm	—
Top Tube Slope	19.6deg	16.3deg -3.3deg
Head Tube Angle	70deg	68.5deg -1.5deg
Seat Tube Angle	74deg	75.5deg +1.5deg
Head Tube Length	110mm	95mm -15mm
Bottom Bracket Drop	78mm	80mm +2mm
Bottom Bracket Height	275mm	281mm +6mm
Chainstay Length	425mm	436mm +11mm
Chainstay Length Horizontal	417.8mm	428.6mm +10.8mm
Front-Center	605mm	606.7mm +1.7mm
Front-Center Horizontal	600.2mm	601.4mm +1.2mm
Wheelbase	1018mm	1030mm +12mm
Fork Offset/Rake	55mm	54mm -1mm
Fork Length (Axle-To-Crown)	—	425mm
Fork Length, Unknown	395mm	—
Trail	70mm high	84.2mm +14.2mm very high
Mechanical Trail	65.7mm	78.3mm +12.6mm
Wheel Flop	22.5mm	28.7mm +6.2mm
Standover Height	—	713mm
Tire to Pedal Spindle	82mm 170 mm cranks	75.7mm -6.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	105mm 170 mm cranks	111mm +6mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	42mm	50mm +8mm
Tire Width Max	50mm	57mm +7mm
Tire Outer Diameter	706mm	722mm +16mm
Bike Length with Tires	1724mm	1752mm +28mm
Suspension Type	Rigid, non-suspension corrected	Rigid, suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc