Compare: 2026 SEKA exaero gr Base 61 vs 2026 Argon 18 Anti Matter Base XL

Insights

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

Design deviates from other sizes of SEKA exaero gr

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

Design deviates from other sizes of Argon 18 Anti Matter

Stack	620mm	607mm -13mm
Reach	408mm	409mm +1mm
Stack to Reach Ratio	1.52:1	1.48:1
Seat Tube Length, C-T	580mm	595mm +15mm
Top Tube Length, Effective/Horizontal Center	598mm	—
Top Tube Length, Effective/Horizontal HT Top	—	601mm
Top Tube Slope	6.5deg	3.9deg -2.6deg
Head Tube Angle	72.2deg	72.2deg +0deg
Seat Tube Angle	73deg	72.5deg -0.5deg
Head Tube Length	195mm	176mm -19mm
Bottom Bracket Drop	70mm	76mm +6mm
Bottom Bracket Height	286mm	280mm -6mm
Chainstay Length	423mm	425mm +2mm
Chainstay Length Horizontal	417.2mm	418.2mm +1mm
Front-Center	641mm	638.4mm -2.6mm
Front-Center Horizontal	637.8mm	633.9mm -3.9mm
Wheelbase	1055mm	1052mm -3mm
Fork Offset/Rake	50mm	51mm +1mm
Fork Length (Axle-To-Crown)	401mm	400mm -1mm
Trail	61.8mm mid/neutral	60.7mm -1.1mm mid/neutral
Mechanical Trail	58.8mm	57.8mm -1mm
Wheel Flop	18mm	17.7mm -0.3mm
Standover Height	858mm	866mm +8mm
Tire to Pedal Spindle	115mm 170 mm cranks	112.4mm -2.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	116mm 170 mm cranks	110mm -6mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	45mm	45mm +0mm
Tire Width Max	52mm	55mm +3mm
Tire Outer Diameter	712mm	712mm +0mm
Bike Length with Tires	1767mm	1764mm -3mm
Suspension Type	Rigid, non-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