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

Insights

Somewhat aggressive 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	627mm	640mm +13mm
Reach	410mm	398mm -12mm
Stack to Reach Ratio	1.53:1	1.61:1
Seat Tube Length, C-T	540mm	518mm -22mm
Seat Tube Length, C-TTT	—	506mm
Top Tube Length, Effective/Horizontal HT Top	602mm	587.6mm -14.4mm
Top Tube Slope	11deg	—
Head Tube Angle	71deg	71.5deg +0.5deg
Seat Tube Angle	73.1deg	—
Effective Seat Tube Angle, ETT HT Top	—	73.5deg
Head Tube Length	176mm	191mm +15mm
Bottom Bracket Drop	76mm	86mm +10mm
Bottom Bracket Height	285mm	282mm -3mm
Chainstay Length	436mm	440mm +4mm
Chainstay Length Horizontal	429.3mm	431.5mm +2.2mm
Front-Center	655.1mm	642mm -13.1mm
Front-Center Horizontal	650.7mm	636.1mm -14.6mm
Wheelbase	1080mm	1067.6mm -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	825mm	—
Tire to Pedal Spindle	124.1mm 170 mm cranks	104mm -20.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	115mm 170 mm cranks	112mm -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	1802mm	1803.6mm +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