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

Insights

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

Design deviates from other sizes of ASSISTING FORCE AF01

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

Design deviates from other sizes of Argon 18 Dark Matter

Stack	556mm	564mm +8mm
Reach	382mm	373mm -9mm
Stack to Reach Ratio	1.46:1	1.51:1
Seat Tube Length, C-T	—	435mm
Seat Tube Length, Unknown	412mm	—
Top Tube Length, Effective/Horizontal HT Top	—	530mm
Top Tube Length, Effective/Horizontal Unknown	542mm	—
Top Tube Slope	17.9deg	16.5deg -1.4deg
Head Tube Angle	70.5deg	70deg -0.5deg
Seat Tube Angle	74deg	74.9deg +0.9deg
Head Tube Length	130mm	112mm -18mm
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	614mm	612.7mm -1.3mm
Front-Center Horizontal	609.2mm	607.4mm -1.8mm
Wheelbase	1027mm	1036mm +9mm
Fork Offset/Rake	55mm	54mm -1mm
Fork Length (Axle-To-Crown)	—	425mm
Fork Length, Unknown	395mm	—
Trail	66.7mm high	73.9mm +7.2mm high
Mechanical Trail	62.8mm	69.5mm +6.7mm
Wheel Flop	21mm	23.8mm +2.8mm
Standover Height	—	729mm
Tire to Pedal Spindle	91mm 170 mm cranks	81.7mm -9.3mm 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	1733mm	1758mm +25mm
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