Average stack and reachvs category

Somewhat aggressive stack and reachvs category

	XXS 44-46	XS 47-50	S 51-53	M 54-56	L 57-59	XL 60-62
Stack	518mm	537mm	558mm	578mm	600mm	623mm
Reach	359mm	369mm	379mm	388mm	397mm	407mm
Stack to Reach Ratio	1.44:1	1.46:1	1.47:1	1.49:1	1.51:1	1.53:1
Seat Tube Length, C-T	420mm	450mm	485mm	520mm	555mm	590mm
Top Tube Length, Effective/Horizontal HT Top	496mm	516mm	537mm	558mm	580mm	604mm
Top Tube Slope	13.5deg	11.9deg	10.1deg	8.4deg	7deg	5.9deg
Head Tube Angle	70.3deg	71.3deg	72deg	72deg	72deg	72.5deg
Seat Tube Angle	75.5deg	74.9deg	74.3deg	73.7deg	73.1deg	72.5deg
Head Tube Length	84mm	101mm	120mm	141mm	166mm	189mm
Bottom Bracket Drop	80mm	80mm	78mm	78mm	75mm	75mm
Bottom Bracket Height	259mm	259mm	261mm	261mm	264mm	264mm
Chainstay Length	417mm	417mm	420mm	420mm	420mm	420mm
Chainstay Length Horizontal	409.3mm	409.3mm	412.7mm	412.7mm	413.3mm	413.3mm
Front-Center	577.3mm	585.2mm	589.5mm	605.4mm	621.3mm	634.2mm
Front-Center Horizontal	571.8mm	579.8mm	584.3mm	600.3mm	616.8mm	629.8mm
Wheelbase	981mm	989mm	997mm	1013mm	1030mm	1043mm
Fork Offset/Rake	52mm	52mm	47mm	47mm	47mm	47mm
Fork Length (Axle-To-Crown)	387mm	387mm	387mm	387mm	387mm	387mm
Trail	66.2mm high	59.9mm mid/neutral	60.7mm mid/neutral	60.7mm mid/neutral	60.7mm mid/neutral	57.6mm mid/neutral
Mechanical Trail	62.3mm	56.7mm	57.8mm	57.8mm	57.8mm	54.9mm
Wheel Flop	21mm	18.2mm	17.9mm	17.9mm	17.9mm	16.5mm
Standover Height	673mm	700mm	734mm	764mm	797mm	827mm
Tire to Pedal Spindle	68.3mm 170 mm cranks	76.2mm 170 mm cranks	80.5mm 170 mm cranks	96.4mm 170 mm cranks	112.3mm 170 mm cranks	125.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	89mm 170 mm cranks	89mm 170 mm cranks	91mm 170 mm cranks	91mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks

	XXS 44-46	XS 47-50	S 51-53	M 54-56	L 57-59	XL 60-62
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	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1659mm	1667mm	1675mm	1691mm	1708mm	1721mm

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.

Learn more about the Upright/Aggressive Scale

Category Trend

Endurance Road

Source:https://www.argon18.com/en-ca/bikes/road/equation/equation

Suggest Bike Edit

2026 Argon 18 Equation Base

Geometry

Base Build

Stack and Reach vs. Category Trend