	S	M	L	XL	XXL
Stack	640mm	659mm	678mm	697mm	715mm
Reach	384mm	394mm	403mm	413mm	422mm
Stack to Reach Ratio	1.67:1	1.67:1	1.68:1	1.69:1	1.69:1
Seat Tube Length, C-T	500mm	540mm	580mm	620mm	660mm
Top Tube Length, Effective/Horizontal HT Top	575mm	590mm	605mm	620mm	635mm
Top Tube Slope	17deg	14.5deg	12.1deg	9.9deg	7.7deg
Head Tube Angle	70.5deg	70.5deg	70.5deg	70.5deg	70.5deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Head Tube Length	180mm	200mm	220mm	240mm	260mm
Bottom Bracket Drop	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	286mm	283mm	271mm	286mm	291mm
Chainstay Length	460mm	460mm	460mm	460mm	460mm
Chainstay Length Horizontal	453.8mm	453.8mm	453.8mm	453.8mm	453.8mm
Front-Center	645.5mm	661.4mm	677.3mm	693.2mm	709.1mm
Front-Center Horizontal	641.2mm	657.2mm	673.2mm	689.2mm	705.2mm
Wheelbase	1095mm	1111mm	1127mm	1143mm	1159mm
Fork Offset/Rake	52mm	52mm	52mm	52mm	52mm
Trail	72.7mm high	71.6mm high	67.4mm high	72.7mm high	74.4mm high
Mechanical Trail	68.5mm	67.5mm	63.5mm	68.5mm	70.2mm
Wheel Flop	22.9mm	22.5mm	21.2mm	22.9mm	23.4mm
Standover Height	766mm	800mm	833mm	861mm	901mm
Tire to Pedal Spindle	114.5mm 170 mm cranks	133.4mm 170 mm cranks	161.3mm 170 mm cranks	162.2mm 170 mm cranks	173.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	116mm 170 mm cranks	113mm 170 mm cranks	101mm 170 mm cranks	116mm 170 mm cranks	121mm 170 mm cranks

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://avaghon.nl/avaghon-atlas/

2026 Avaghon Atlas Base

Geometry