2023 Van Nicholas Zephyr Base

	S	M	L	XL	XXL
Stack	546mm	556mm	577mm	598mm	623mm
Reach	361mm	362mm	366mm	370mm	374mm
Stack to Reach Ratio	1.51:1	1.54:1	1.58:1	1.62:1	1.67:1
Seat Tube Length, C-T	450mm	480mm	510mm	540mm	570mm
Seat Tube Length, C-C	410mm	440mm	465mm	495mm	520mm
Top Tube Length, Effective/Horizontal Center	512mm	521mm	537mm	558mm	576mm
Top Tube Length, Actual C-C	495mm	504mm	518mm	537mm	552mm
Top Tube Slope	10.9deg	9.6deg	10.2deg	9.8deg	10.9deg
Head Tube Angle	71deg	71.5deg	72deg	72.5deg	73deg
Seat Tube Angle	74.5deg	74deg	73.5deg	72.5deg	72deg
Head Tube Length	135mm	145mm	165mm	185mm	210mm
Bottom Bracket Drop	75mm	75mm	75mm	75mm	75mm
Bottom Bracket Height	264mm	264mm	264mm	264mm	264mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	418.3mm	418.3mm	418.3mm	418.3mm	418.3mm
Front-Center	573mm	573mm	579mm	584mm	591mm
Front-Center Horizontal	567.7mm	567.7mm	574.7mm	579.7mm	586.7mm
Wheelbase	986mm	986mm	993mm	998mm	1005mm
Fork Offset/Rake	42.1mm	42.4mm	43.3mm	42.7mm	43.2mm
Trail	72.2mm high	68.7mm high	64.6mm mid/neutral	62.1mm mid/neutral	58.5mm mid/neutral
Mechanical Trail	68.3mm	65.2mm	61.4mm	59.2mm	56mm
Wheel Flop	22.2mm	20.7mm	19mm	17.8mm	16.4mm
Standover Height	724mm	747mm	771mm	797mm	822mm
Tire to Pedal Spindle	64mm 170 mm cranks	64mm 170 mm cranks	70mm 170 mm cranks	75mm 170 mm cranks	82mm 170 mm cranks
Pedal Spindle to Ground Clearance	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 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.vannicholas.com/road-bikes/zephyr

Geometry