Compare: 2026 Argon 18 Nitrogen Base XXS vs 2023 BXT BX-Road-145 Pro-145 47

Insights

Somewhat aggressive stack and reach vs trend of performance road bikes

Design deviates from other sizes of Argon 18 Nitrogen

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of BXT BX-Road-145

Stack	486mm	508.4mm +22.4mm
Reach	370mm	372mm +2mm
Stack to Reach Ratio	1.31:1	1.37:1
Seat Tube Length, C-T	—	450mm
Seat Tube Length, C-TTT	395mm	—
Top Tube Length, Effective/Horizontal Center	502mm	512mm +10mm
Top Tube Slope	10.1deg	8.6deg -1.5deg
Head Tube Angle	71.2deg	72.1deg +0.9deg
Seat Tube Angle	75deg	74.6deg -0.4deg
Head Tube Length	81mm	100mm +19mm
Bottom Bracket Drop	71mm	70mm -1mm
Bottom Bracket Height	270mm	269mm -1mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.8mm	404mm +0.2mm
Front-Center	567.7mm	565.2mm -2.5mm
Front-Center Horizontal	563.2mm	560.8mm -2.4mm
Wheelbase	967mm	964.8mm -2.2mm
Fork Offset/Rake	49mm	45mm -4mm
Fork Length (Axle-To-Crown)	376mm	375mm -1mm
Trail	64.3mm mid/neutral	62.2mm -2.1mm mid/neutral
Mechanical Trail	60.9mm	59.2mm -1.7mm
Wheel Flop	19.6mm	18.2mm -1.4mm
Tire to Pedal Spindle	61.7mm 165 mm cranks	56.2mm -5.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	105mm 165 mm cranks	99mm -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	32mm -2mm
Tire Outer Diameter	682mm	678mm -4mm
Bike Length with Tires	1649mm	1642.8mm -6.2mm
Crank Length	165mm	—
Handlebar Width	360mm	—
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