Argon 18 Nitrogen (2026)

aero road · carbon · sizes XXS–XL · tyres up to 34 mm Manufacturer’s website

Good to know: Integrated cockpit

Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.

Geometry ?

Argon 18 Nitrogen 2026 geometry in sizes XXS–XL: stack 486–607 mm, reach 370–409 mm, head angle 71.2–73°.

	XXS	XS	S	M	L	XL
Stack	486 mm	508 mm	531 mm	555 mm	580 mm	607 mm
Reach	370 mm	377 mm	384 mm	392 mm	400 mm	409 mm
Head angle	71.2°	72.1°	72.7°	72.7°	72.7°	73°
Seat angle	75°	74.5°	74°	73.5°	73°	72.5°
Seat tube (c-t)	395 mm	425 mm	460 mm	505 mm	550 mm	595 mm
Head tube	81 mm	97 mm	113 mm	138 mm	165 mm	192 mm
Top tube (effective)	502 mm	519 mm	537 mm	557 mm	578 mm	601 mm
BB drop	71 mm	75 mm	79 mm	79 mm	79 mm	79 mm
Chainstay	410 mm	410 mm	410 mm	410 mm	410 mm	410 mm
Wheelbase	967 mm	972 mm	975 mm	990 mm	1006 mm	1020 mm
Standover	682 mm	706 mm	734 mm	772 mm	810 mm	848 mm
Fork length	376 mm	376 mm	376 mm	376 mm	376 mm	376 mm
Fork offset	49 mm	49 mm	45 mm	45 mm	45 mm	45 mm
Stock build by size
Cranks	165 mm	165 mm	170 mm	170 mm	172.5 mm	172.5 mm
Stem	80 mm	90 mm	90 mm	100 mm	110 mm	120 mm
Bar width	360 mm	360 mm	360 mm	380 mm	380 mm	380 mm

Source: argon18.com, checked 1 Nov 2026 · bar position: worked out from published data

Stock build

Nitrogen SRAM Force AXS E1 €8,595

Groupset: SRAM Force AXS E1 2×12
Shifters: SRAM Force AXS E1
Cranks: SRAM Force AXS Powermeter 48/35
Stem: ATTEN CHB-01 Aero Handlebar
Handlebar: ATTEN CHB-01 Aero Handlebar
Seatpost: Argon 18 Nitrogen
Saddle: Repente Quasar 2.0
List price: €8,595 (argon18.com, 1 Nov 2026)

Nitrogen Shimano Ultegra Di2 €7,795

Groupset: Shimano Ultegra Di2 R8100 2×12
Shifters: Shimano Ultegra Di2 R8170
Cranks: Shimano Ultegra R8100 52/36
Stem: ATTEN CHB-01 Aero Handlebar
Handlebar: ATTEN CHB-01 Aero Handlebar
Seatpost: Argon 18 Nitrogen
Saddle: Repente Quasar 2.0
List price: €7,795 (argon18.com, 1 Nov 2026)

Nitrogen Shimano 105 Di2 €5,995

Groupset: Shimano 105 Di2 R7100 2×12
Shifters: Shimano 105 Di2 R7170
Cranks: Shimano 105 FC-R7100 52/36
Stem: ATTEN CHB-01 Aero Handlebar
Handlebar: ATTEN CHB-01 Aero Handlebar
Seatpost: Argon 18 Nitrogen
Saddle: Repente Quasar S
List price: €5,995 (argon18.com, 1 Nov 2026)

Source for all builds: argon18.com, checked 1 Nov 2026

Frames with similar geometry

Stack and reach within 12 mm of size M (stack 555 / reach 392 mm).

Argon 18 Nitrogen Pro (2026)size M · stack 555 / reach 392 mm Thömus Sliker Pro Ultimate (2026)size 57 · stack 556 / reach 392 mm Van Rysel EDR CF (gen 1) (2026)size M · stack 555 / reach 393 mm Wilier Filante SLR (2027)size L · stack 555 / reach 391 mm Pardus Robin Evo (2026)size L · stack 554 / reach 391 mm Quick Pro ER:ONE (2026)size L/520 · stack 556 / reach 393 mm

Spotted a mistake or a missing build? Let me know.