Compare: 2026 Argon 18 Dark Matter 3D High Stack XS vs 2026 SPCYCLE G028 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 progressive gravel bikes

Design deviates from other sizes of SPCYCLE G028

Stack	564mm	555mm -9mm
Reach	373mm	385mm +12mm
Stack to Reach Ratio	1.51:1	1.44:1
Seat Tube Length, C-T	435mm	—
Seat Tube Length, C-TTT	—	445mm
Top Tube Length, Effective/Horizontal HT Top	530mm	—
Top Tube Length, Effective/Horizontal Unknown	—	533.6mm
Top Tube Slope	16.5deg	11.9deg -4.6deg
Head Tube Angle	70deg	71deg +1deg
Seat Tube Angle	74.9deg	74deg -0.9deg
Head Tube Length	112mm	115mm +3mm
Bottom Bracket Drop	80mm	80mm +0mm
Bottom Bracket Height	281mm	286mm +5mm
Chainstay Length	436mm	435mm -1mm
Chainstay Length Horizontal	428.6mm	427.6mm -1mm
Front-Center	612.7mm	612mm -0.7mm
Front-Center Horizontal	607.4mm	606.4mm -1mm
Wheelbase	1036mm	1034mm -2mm
Fork Offset/Rake	54mm	55mm +1mm
Fork Length (Axle-To-Crown)	425mm	—
Fork Length, Unknown	—	405mm
Trail	73.9mm high	67.9mm -6mm high
Mechanical Trail	69.5mm	64.2mm -5.3mm
Wheel Flop	23.8mm	20.9mm -2.9mm
Standover Height	729mm	—
Tire to Pedal Spindle	81.7mm 170 mm cranks	76mm -5.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	111mm 170 mm cranks	116mm +5mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	50mm	55mm +5mm
Tire Width Max	57mm	—
Tire Outer Diameter	722mm	732mm +10mm
Bike Length with Tires	1758mm	1766mm +8mm
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