Compare: 2026 Argon 18 Nitrogen Base XS vs 2021 Trifox Bike X18 Base 49

Insights

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of Argon 18 Nitrogen

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of Trifox Bike X18

Stack	508mm	504mm -4mm
Reach	377mm	378mm +1mm
Stack to Reach Ratio	1.35:1	1.33:1
Seat Tube Length, C-T	—	447mm
Seat Tube Length, C-TTT	425mm	—
Top Tube Length, Effective/Horizontal Center	519mm	509mm -10mm
Top Tube Slope	9.1deg	8.3deg -0.8deg
Head Tube Angle	72.1deg	71.75deg -0.35deg
Seat Tube Angle	74.5deg	75.5deg +1deg
Head Tube Length	97mm	102mm +5mm
Bottom Bracket Drop	75mm	74mm -1mm
Bottom Bracket Height	266mm	265mm -1mm
Chainstay Length	410mm	415mm +5mm
Chainstay Length Horizontal	403.1mm	408.4mm +5.3mm
Front-Center	573.8mm	574mm +0.2mm
Front-Center Horizontal	568.9mm	569.7mm +0.8mm
Wheelbase	972mm	978mm +6mm
Fork Offset/Rake	49mm	47mm -2mm
Fork Length (Axle-To-Crown)	376mm	—
Fork Length, Unknown	—	366mm
Trail	58.7mm mid/neutral	62.3mm +3.6mm mid/neutral
Mechanical Trail	55.8mm	59.2mm +3.4mm
Wheel Flop	17.2mm	18.5mm +1.3mm
Tire to Pedal Spindle	67.8mm 165 mm cranks	65mm -2.8mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 165 mm cranks	95mm -6mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	28mm -2mm
Tire Width Max	34mm	—
Tire Outer Diameter	682mm	678mm -4mm
Bike Length with Tires	1654mm	1656mm +2mm
Crank Length	165mm	—
Handlebar Width	369mm	—
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