2023 hosking HR4 Base

	45	48	51	54	57
Stack	—	510mm	523mm	545mm	561mm
Reach	—	367mm	379mm	382mm	391mm
Stack to Reach Ratio	—	1.39:1	1.38:1	1.43:1	1.43:1
Seat Tube Length, C-T	—	441mm	473mm	502.5mm	535mm
Seat Tube Length, C-C	—	420mm	453mm	485mm	—
Top Tube Length, Effective/Horizontal Center	—	510mm	530mm	543mm	565mm
Top Tube Slope	—	10deg	7.6deg	6.9deg	5.1deg
Head Tube Angle	—	71deg	72.1deg	73deg	74deg
Seat Tube Angle	—	74.3deg	74.4deg	73.5deg	73.5deg
Head Tube Length	—	97.5mm	107.5mm	127mm	140mm
Bottom Bracket Drop	—	72mm	70mm	70mm	70mm
Bottom Bracket Height	—	271mm	273mm	273mm	273mm
Chainstay Length	—	408mm	408mm	410mm	410mm
Chainstay Length Horizontal	—	401.6mm	402mm	404mm	404mm
Front-Center	—	577mm	579mm	580mm	595mm
Front-Center Horizontal	—	572.4mm	575.1mm	576mm	579mm
Wheelbase	—	974mm	977mm	980mm	983mm
Fork Offset/Rake	—	51.6mm	47.3mm	46.7mm	45.4mm
Fork Length (Axle-To-Crown)	—	373.5mm	373.5mm	373.5mm	373.5mm
Trail	— —	63.5mm mid/neutral	61.1mm mid/neutral	56.1mm mid/neutral	51.1mm mid/neutral
Mechanical Trail	—	60.1mm	58.1mm	53.6mm	49.2mm
Wheel Flop	—	19.6mm	17.9mm	15.7mm	13.6mm
Standover Height	—	705mm	743mm	760mm	790mm
Tire to Pedal Spindle	— 170 mm cranks	64mm 170 mm cranks	66mm 170 mm cranks	64.5mm 172.5 mm cranks	77mm 175 mm cranks
Pedal Spindle to Ground Clearance	— 170 mm cranks	101mm 170 mm cranks	103mm 170 mm cranks	100.5mm 172.5 mm cranks	98mm 175 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://hoskingbikes.com/products/road-hr4-axs

Geometry