2025 Bombtrack Bicycle Company Hook EXT Base

	XS	S	M	L	XL
Stack	558mm	577mm	593mm	612mm	631mm
Reach	360mm	369mm	381mm	390mm	403mm
Stack to Reach Ratio	1.55:1	1.56:1	1.56:1	1.57:1	1.57:1
Seat Tube Length, Unknown	460mm	500mm	530mm	570mm	600mm
Top Tube Length, Effective/Horizontal Unknown	520mm	534mm	558mm	572mm	597mm
Top Tube Slope	13.4deg	10.8deg	9.1deg	6.8deg	5.7deg
Head Tube Angle	70.9deg	70.9deg	71.5deg	71.5deg	71.5deg
Seat Tube Angle	73.9deg	73.9deg	73.5deg	73.5deg	73deg
Head Tube Length	110mm	130mm	150mm	170mm	190mm
Bottom Bracket Drop	71mm	71mm	66mm	66mm	66mm
Bottom Bracket Height	248.5mm	248.5mm	253.5mm	253.5mm	253.5mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	419mm	419mm	419.8mm	419.8mm	419.8mm
Front-Center	588mm	603mm	618mm	632mm	652mm
Front-Center Horizontal	584mm	599mm	614.2mm	629.2mm	648.2mm
Wheelbase	1003mm	1018mm	1034mm	1049mm	1068mm
Fork Offset/Rake	53mm	53mm	53mm	53mm	53mm
Fork Length (Axle-To-Crown)	410mm	410mm	410mm	410mm	410mm
Trail	54.6mm mid/neutral	54.6mm mid/neutral	51mm mid/neutral	51mm mid/neutral	51mm mid/neutral
Mechanical Trail	51.6mm	51.6mm	48.4mm	48.4mm	48.4mm
Wheel Flop	16.9mm	16.9mm	15.4mm	15.4mm	15.4mm
Standover Height	753mm	782mm	805mm	834mm	857mm
Tire to Pedal Spindle	98.5mm 170 mm cranks	113.5mm 170 mm cranks	128.5mm 170 mm cranks	142.5mm 170 mm cranks	162.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	78.5mm 170 mm cranks	78.5mm 170 mm cranks	83.5mm 170 mm cranks	83.5mm 170 mm cranks	83.5mm 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://www.bombtrack.com/my25/complete-bikes/hook-ext-apex-eagle

Geometry