Compare: 2026 Argon 18 Dark Matter 3D High Stack XS vs 2026 Mondince FM356 Base S

Insights

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

Design deviates from other sizes of Argon 18 Dark Matter

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

Design deviates from other sizes of Mondince FM356

Stack	564mm	565.5mm +1.5mm
Reach	373mm	370mm -3mm
Stack to Reach Ratio	1.51:1	1.53:1
Seat Tube Length, C-T	435mm	449mm +14mm
Seat Tube Length, C-TTT	—	437mm
Top Tube Length, Effective/Horizontal HT Top	530mm	537.5mm +7.5mm
Top Tube Slope	16.5deg	—
Head Tube Angle	70deg	70.5deg +0.5deg
Seat Tube Angle	74.9deg	—
Effective Seat Tube Angle, ETT HT Top	—	73.5deg
Head Tube Length	112mm	111mm -1mm
Bottom Bracket Drop	80mm	91mm +11mm
Bottom Bracket Height	281mm	277mm -4mm
Chainstay Length	436mm	440mm +4mm
Chainstay Length Horizontal	428.6mm	430.5mm +1.9mm
Front-Center	612.7mm	598mm -14.7mm
Front-Center Horizontal	607.4mm	582mm -25.4mm
Wheelbase	1036mm	1012.5mm -23.5mm
Fork Offset/Rake	54mm	50mm -4mm
Fork Length (On-Axis)	—	409mm
Fork Length (Axle-To-Crown)	425mm	—
Trail	73.9mm high	77.3mm +3.4mm high
Mechanical Trail	69.5mm	72.8mm +3.3mm
Wheel Flop	23.8mm	24.3mm +0.5mm
Standover Height	729mm	—
Tire to Pedal Spindle	81.7mm 170 mm cranks	60mm -21.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	111mm 170 mm cranks	107mm -4mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	50mm	57mm +7mm
Tire Width Max	57mm	61mm +4mm
Tire Outer Diameter	722mm	736mm +14mm
Bike Length with Tires	1758mm	1748.5mm -9.5mm
Suspension Type	Rigid, 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