Name: 2026 Argon 18 Sum Pro
Brand: Argon 18

	XXS	XS	S	M	L	XL
Stack	495mm	517mm	540mm	564mm	589mm	616mm
Reach	367mm	374mm	382mm	390mm	398mm	407mm
Stack to Reach Ratio	1.35:1	1.38:1	1.41:1	1.45:1	1.48:1	1.51:1
Seat Tube Length, Unknown	395mm	425mm	460mm	505mm	550mm	595mm
Top Tube Length, Effective/Horizontal Unknown	503mm	520mm	538mm	557mm	578mm	600mm
Top Tube Slope	13.6deg	12.4deg	10.9deg	8.5deg	6.4deg	4.7deg
Head Tube Angle	71.2deg	72.1deg	72.7deg	72.7deg	72.7deg	73deg
Seat Tube Angle	75deg	74.5deg	74deg	73.5deg	73deg	72.5deg
Head Tube Length	94mm	110mm	126mm	151mm	177mm	205mm
Bottom Bracket Drop	69mm	73mm	77mm	77mm	77mm	77mm
Bottom Bracket Height	267mm	263mm	259mm	259mm	259mm	259mm
Chainstay Length	410mm	410mm	410mm	410mm	410mm	410mm
Chainstay Length Horizontal	404.2mm	403.5mm	402.7mm	402.7mm	402.7mm	402.7mm
Front-Center	567.1mm	573.2mm	577.5mm	592.3mm	608.2mm	622.1mm
Front-Center Horizontal	562.9mm	568.6mm	572.3mm	587.3mm	603.3mm	617.3mm
Wheelbase	967mm	972mm	975mm	990mm	1006mm	1020mm
Fork Offset/Rake	48mm	48mm	44mm	44mm	44mm	44mm
Fork Length, Unknown	374mm	374mm	374mm	374mm	374mm	374mm
Trail	63.7mm mid/neutral	58.1mm mid/neutral	58.6mm mid/neutral	58.6mm mid/neutral	58.6mm mid/neutral	56.7mm mid/neutral
Mechanical Trail	60.3mm	55.3mm	55.9mm	55.9mm	55.9mm	54.2mm
Wheel Flop	19.4mm	17mm	16.6mm	16.6mm	16.6mm	15.9mm
Tire to Pedal Spindle	66.1mm 165 mm cranks	67.2mm 170 mm cranks	71.5mm 170 mm cranks	83.8mm 172.5 mm cranks	99.7mm 172.5 mm cranks	111.1mm 175 mm cranks
Pedal Spindle to Ground Clearance	102mm 165 mm cranks	93mm 170 mm cranks	89mm 170 mm cranks	86.5mm 172.5 mm cranks	86.5mm 172.5 mm cranks	84mm 175 mm cranks

	XXS	XS	S	M	L	XL
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	25mm	25mm	25mm	25mm	25mm
Tire Width Max	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	672mm	672mm	672mm	672mm	672mm	672mm
Bike Length with Tires	1639mm	1644mm	1647mm	1662mm	1678mm	1692mm
Crank Length	165mm	170mm	170mm	172.5mm	172.5mm	175mm
Handlebar Width	40cm	40cm	42cm	44cm	44cm	44cm
Stem Length	70mm	80mm	90mm	100mm	110mm	120mm

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Category Trend

Source:https://www.argon18.com/de/bikes/road/sum/shimano-105-di2

2026 Argon 18 Sum Pro

Geometry