	S	M	L	XL
Stack	566mm	594mm	622mm	650mm
Reach	400mm	430mm	460mm	490mm
Stack to Reach Ratio	1.42:1	1.38:1	1.35:1	1.33:1
Seat Tube Length, C-T	420mm	470mm	520mm	570mm
Top Tube Length, Effective/Horizontal HT Top	573mm	612mm	650mm	689mm
Top Tube Slope	17.5deg	14.3deg	11.5deg	9.1deg
Head Tube Angle	69deg	69deg	69deg	69deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Head Tube Length	110mm	140mm	170mm	200mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm
Bottom Bracket Height	298.2mm	298.2mm	298.2mm	298.2mm
Chainstay Length	450mm	450mm	450mm	450mm
Chainstay Length Horizontal	444.5mm	444.5mm	444.5mm	444.5mm
Front-Center	643mm	683mm	724mm	764mm
Front-Center Horizontal	638.5mm	679.5mm	720.5mm	760.5mm
Wheelbase	1083mm	1124mm	1165mm	1205mm
Fork Offset/Rake	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	435mm	435mm	435mm	435mm
Trail	93.1mm very high	93.1mm very high	93.1mm very high	93.1mm very high
Mechanical Trail	86.9mm	86.9mm	86.9mm	86.9mm
Wheel Flop	31.2mm	31.2mm	31.2mm	31.2mm
Standover Height	733mm	773mm	816mm	844mm
Tire to Pedal Spindle	104.9mm 170 mm cranks	144.9mm 170 mm cranks	185.9mm 170 mm cranks	225.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	128.2mm 170 mm cranks	128.2mm 170 mm cranks	128.2mm 170 mm cranks	128.2mm 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://konaworld.com/products/humu-37

2026 Kona Bicycle Company Humuhumu Base

Geometry