Compare: 2026 Argon 18 Dark Matter 3D High Stack M vs 2026 Mondince FM356 Base L

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	606mm	617mm +11mm
Reach	398mm	386mm -12mm
Stack to Reach Ratio	1.52:1	1.6:1
Seat Tube Length, C-T	495mm	504mm +9mm
Seat Tube Length, C-TTT	—	492mm
Top Tube Length, Effective/Horizontal HT Top	577mm	569mm -8mm
Top Tube Slope	13.7deg	—
Head Tube Angle	71deg	71.5deg +0.5deg
Seat Tube Angle	73.7deg	—
Effective Seat Tube Angle, ETT HT Top	—	73.7deg
Head Tube Length	151mm	164mm +13mm
Bottom Bracket Drop	78mm	88mm +10mm
Bottom Bracket Height	283mm	280mm -3mm
Chainstay Length	436mm	440mm +4mm
Chainstay Length Horizontal	429mm	431.1mm +2.1mm
Front-Center	634.8mm	622mm -12.8mm
Front-Center Horizontal	630mm	615.5mm -14.5mm
Wheelbase	1059mm	1046.6mm -12.4mm
Fork Offset/Rake	48mm	50mm +2mm
Fork Length (On-Axis)	—	409mm
Fork Length (Axle-To-Crown)	425mm	—
Trail	73.5mm high	70.4mm -3.1mm high
Mechanical Trail	69.5mm	66.8mm -2.7mm
Wheel Flop	22.6mm	21.2mm -1.4mm
Standover Height	786mm	—
Tire to Pedal Spindle	103.8mm 170 mm cranks	84mm -19.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	113mm 170 mm cranks	110mm -3mm 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	1781mm	1782.6mm +1.6mm
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